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<!DOCTYPE html><html lang="en-US"><head><title>Programming 2. Conditionals</title><meta property="og:title" content="Programming 2. 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/*!
* Marp default theme.
*
* @theme default
* @author Yuki Hattori
*
* @auto-scaling true
* @size 16:9 1280px 720px
* @size 4:3 960px 720px
*/div#\:\$p>svg>foreignObject>section,div#\:\$p>svg>foreignObject>section 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.pl-ii{background-color:var(--color-prettylights-syntax-invalid-illegal-bg);color:var(--color-prettylights-syntax-invalid-illegal-text)}div#\:\$p>svg>foreignObject>section .pl-c2{background-color:var(--color-prettylights-syntax-carriage-return-bg);color:var(--color-prettylights-syntax-carriage-return-text)}div#\:\$p>svg>foreignObject>section .pl-sr .pl-cce{color:var(--color-prettylights-syntax-string-regexp);font-weight:700}div#\:\$p>svg>foreignObject>section .pl-ml{color:var(--color-prettylights-syntax-markup-list)}div#\:\$p>svg>foreignObject>section .pl-mh,div#\:\$p>svg>foreignObject>section .pl-mh .pl-en,div#\:\$p>svg>foreignObject>section .pl-ms{color:var(--color-prettylights-syntax-markup-heading);font-weight:700}div#\:\$p>svg>foreignObject>section .pl-mi{color:var(--color-prettylights-syntax-markup-italic);font-style:italic}div#\:\$p>svg>foreignObject>section .pl-mb{color:var(--color-prettylights-syntax-markup-bold);font-weight:700}div#\:\$p>svg>foreignObject>section .pl-md{background-color:var(--color-prettylights-syntax-markup-deleted-bg);color:var(--color-prettylights-syntax-markup-deleted-text)}div#\:\$p>svg>foreignObject>section .pl-mi1{background-color:var(--color-prettylights-syntax-markup-inserted-bg);color:var(--color-prettylights-syntax-markup-inserted-text)}div#\:\$p>svg>foreignObject>section .pl-mc{background-color:var(--color-prettylights-syntax-markup-changed-bg);color:var(--color-prettylights-syntax-markup-changed-text)}div#\:\$p>svg>foreignObject>section .pl-mi2{background-color:var(--color-prettylights-syntax-markup-ignored-bg);color:var(--color-prettylights-syntax-markup-ignored-text)}div#\:\$p>svg>foreignObject>section .pl-mdr{color:var(--color-prettylights-syntax-meta-diff-range);font-weight:700}div#\:\$p>svg>foreignObject>section .pl-ba{color:var(--color-prettylights-syntax-brackethighlighter-angle)}div#\:\$p>svg>foreignObject>section .pl-sg{color:var(--color-prettylights-syntax-sublimelinter-gutter-mark)}div#\:\$p>svg>foreignObject>section .pl-corl{color:var(--color-prettylights-syntax-constant-other-reference-link);text-decoration:underline}div#\:\$p>svg>foreignObject>section g-emoji{display:inline-block;font-family:Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol;font-size:1em;font-style:normal!important;font-weight:var(--base-text-weight-normal,400);line-height:1;min-width:1ch;vertical-align:-.075em}div#\:\$p>svg>foreignObject>section g-emoji img{height:1em;width:1em}div#\:\$p>svg>foreignObject>section .task-list-item{list-style-type:none}div#\:\$p>svg>foreignObject>section .task-list-item label{font-weight:var(--base-text-weight-normal,400)}div#\:\$p>svg>foreignObject>section .task-list-item.enabled label{cursor:pointer}div#\:\$p>svg>foreignObject>section .task-list-item+.task-list-item{margin-top:4px}div#\:\$p>svg>foreignObject>section .task-list-item .handle{display:none}div#\:\$p>svg>foreignObject>section .task-list-item-checkbox{margin:0 .2em .25em -1.4em;vertical-align:middle}div#\:\$p>svg>foreignObject>section .contains-task-list:dir(rtl) .task-list-item-checkbox{margin:0 -1.6em .25em .2em}div#\:\$p>svg>foreignObject>section .contains-task-list{position:relative}div#\:\$p>svg>foreignObject>section .contains-task-list:focus-within .task-list-item-convert-container,div#\:\$p>svg>foreignObject>section .contains-task-list:hover .task-list-item-convert-container{clip:auto;display:block;height:24px;overflow:visible;width:auto}div#\:\$p>svg>foreignObject>section ::-webkit-calendar-picker-indicator{filter:invert(50%)}div#\:\$p>svg>foreignObject>section :is(h1,marp-h1){color:var(--h1-color);font-size:1.6em}div#\:\$p>svg>foreignObject>section :is(h1,marp-h1),div#\:\$p>svg>foreignObject>section :is(h2,marp-h2){border-bottom:none}div#\:\$p>svg>foreignObject>section :is(h2,marp-h2){font-size:1.3em}div#\:\$p>svg>foreignObject>section :is(h3,marp-h3){font-size:1.1em}div#\:\$p>svg>foreignObject>section :is(h4,marp-h4){font-size:1.05em}div#\:\$p>svg>foreignObject>section :is(h5,marp-h5){font-size:1em}div#\:\$p>svg>foreignObject>section :is(h6,marp-h6){font-size:.9em}div#\:\$p>svg>foreignObject>section :is(h1,marp-h1) strong,div#\:\$p>svg>foreignObject>section :is(h2,marp-h2) strong,div#\:\$p>svg>foreignObject>section :is(h3,marp-h3) strong,div#\:\$p>svg>foreignObject>section :is(h4,marp-h4) strong,div#\:\$p>svg>foreignObject>section :is(h5,marp-h5) strong,div#\:\$p>svg>foreignObject>section :is(h6,marp-h6) strong{color:var(--heading-strong-color);font-weight:inherit}div#\:\$p>svg>foreignObject>section :is(h1,marp-h1)::part(auto-scaling),div#\:\$p>svg>foreignObject>section :is(h2,marp-h2)::part(auto-scaling),div#\:\$p>svg>foreignObject>section :is(h3,marp-h3)::part(auto-scaling),div#\:\$p>svg>foreignObject>section :is(h4,marp-h4)::part(auto-scaling),div#\:\$p>svg>foreignObject>section 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:is(pre,marp-pre) :where(.hljs-type),div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-variable.language_){color:var(--color-prettylights-syntax-keyword)}div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-title),div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-title.class_),div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-title.class_.inherited__),div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-title.function_){color:var(--color-prettylights-syntax-entity)}div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-attr),div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-attribute),div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-literal),div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-meta),div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-number),div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-operator),div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-selector-attr),div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-selector-class),div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-selector-id),div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-variable){color:var(--color-prettylights-syntax-constant)}div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-meta .hljs-string),div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-regexp),div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-string){color:var(--color-prettylights-syntax-string)}div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-built_in),div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-symbol){color:var(--color-prettylights-syntax-variable)}div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-code),div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-comment),div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-formula){color:var(--color-prettylights-syntax-comment)}div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-name),div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-quote),div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-selector-pseudo),div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-selector-tag){color:var(--color-prettylights-syntax-entity-tag)}div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-subst){color:var(--color-prettylights-syntax-storage-modifier-import)}div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-section){color:var(--color-prettylights-syntax-markup-heading);font-weight:700}div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-bullet){color:var(--color-prettylights-syntax-markup-list)}div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-emphasis){color:var(--color-prettylights-syntax-markup-italic);font-style:italic}div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-strong){color:var(--color-prettylights-syntax-markup-bold);font-weight:700}div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-addition){background-color:var(--color-prettylights-syntax-markup-inserted-bg);color:var(--color-prettylights-syntax-markup-inserted-text)}div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-deletion){background-color:var(--color-prettylights-syntax-markup-deleted-bg);color:var(--color-prettylights-syntax-markup-deleted-text)}div#\:\$p>svg>foreignObject>section footer,div#\:\$p>svg>foreignObject>section header{color:var(--header-footer-color);font-size:18px;left:30px;margin:0;position:absolute}div#\:\$p>svg>foreignObject>section header{top:21px}div#\:\$p>svg>foreignObject>section footer{bottom:21px}div#\:\$p>svg>foreignObject>section{--h1-color:#246;--header-footer-color:hsla(0,0%,40%,.75);--heading-strong-color:#48c;--paginate-color:#777;align-items:stretch;display:flex;flex-flow:column nowrap;font-size:29px;height:720px;justify-content:center;padding:78.5px;width:1280px}div#\:\$p>svg>foreignObject>section{--marpit-root-font-size:29px}div#\:\$p>svg>foreignObject>section:where(.invert){--h1-color:#cee7ff;--header-footer-color:hsla(0,0%,60%,.75);--heading-strong-color:#7bf;--paginate-color:#999}div#\:\$p>svg>foreignObject>section>:last-child,div#\:\$p>svg>foreignObject>section[data-footer]>:nth-last-child(2){margin-bottom:0}div#\:\$p>svg>foreignObject>section>:first-child,div#\:\$p>svg>foreignObject>section>header:first-child+*{margin-top:0}div#\:\$p>svg>foreignObject>section:after{bottom:21px;color:var(--paginate-color);font-size:24px;padding:0;position:absolute;right:30px}div#\:\$p>svg>foreignObject>section:after{--marpit-root-font-size:24px}div#\:\$p>svg>foreignObject>section[data-color] :is(h1,marp-h1),div#\:\$p>svg>foreignObject>section[data-color] :is(h2,marp-h2),div#\:\$p>svg>foreignObject>section[data-color] :is(h3,marp-h3),div#\:\$p>svg>foreignObject>section[data-color] :is(h4,marp-h4),div#\:\$p>svg>foreignObject>section[data-color] :is(h5,marp-h5),div#\:\$p>svg>foreignObject>section[data-color] :is(h6,marp-h6){color:currentcolor}div#\:\$p>svg>foreignObject>section[data-marpit-advanced-background=background]{columns:initial!important;display:block!important;padding:0!important}div#\:\$p>svg>foreignObject>section[data-marpit-advanced-background=background]:after,div#\:\$p>svg>foreignObject>section[data-marpit-advanced-background=background]:before,div#\:\$p>svg>foreignObject>section[data-marpit-advanced-background=content]:after,div#\:\$p>svg>foreignObject>section[data-marpit-advanced-background=content]:before{display:none!important}div#\:\$p>svg>foreignObject>section[data-marpit-advanced-background=background]>div[data-marpit-advanced-background-container]{all:initial;display:flex;flex-direction:row;height:100%;overflow:hidden;width:100%}div#\:\$p>svg>foreignObject>section[data-marpit-advanced-background=background]>div[data-marpit-advanced-background-container][data-marpit-advanced-background-direction=vertical]{flex-direction:column}div#\:\$p>svg>foreignObject>section[data-marpit-advanced-background=background][data-marpit-advanced-background-split]>div[data-marpit-advanced-background-container]{width:var(--marpit-advanced-background-split,50%)}div#\:\$p>svg>foreignObject>section[data-marpit-advanced-background=background][data-marpit-advanced-background-split=right]>div[data-marpit-advanced-background-container]{margin-left:calc(100% - var(--marpit-advanced-background-split, 50%))}div#\:\$p>svg>foreignObject>section[data-marpit-advanced-background=background]>div[data-marpit-advanced-background-container]>figure{all:initial;background-position:center;background-repeat:no-repeat;background-size:cover;flex:auto;margin:0}div#\:\$p>svg>foreignObject>section[data-marpit-advanced-background=background]>div[data-marpit-advanced-background-container]>figure>figcaption{position:absolute;border:0;clip:rect(0,0,0,0);height:1px;margin:-1px;overflow:hidden;padding:0;white-space:nowrap;width:1px}div#\:\$p>svg>foreignObject>section[data-marpit-advanced-background=content],div#\:\$p>svg>foreignObject>section[data-marpit-advanced-background=pseudo]{background:transparent!important}div#\:\$p>svg>foreignObject>section[data-marpit-advanced-background=pseudo],div#\:\$p>svg[data-marpit-svg]>foreignObject[data-marpit-advanced-background=pseudo]{pointer-events:none!important}div#\:\$p>svg>foreignObject>section[data-marpit-advanced-background-split]{width:100%;height:100%}</style></head><body><div class="bespoke-marp-osc"><button data-bespoke-marp-osc="prev" tabindex="-1" title="Previous slide">Previous slide</button><span data-bespoke-marp-osc="page"></span><button data-bespoke-marp-osc="next" tabindex="-1" title="Next slide">Next slide</button><button data-bespoke-marp-osc="fullscreen" tabindex="-1" title="Toggle fullscreen (f)">Toggle fullscreen</button><button data-bespoke-marp-osc="presenter" tabindex="-1" title="Open presenter view (p)">Open presenter view</button></div><div id=":$p"><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="1" data-paginate="true" data-class="invert" data-heading-divider="3" lang="en-US" class="invert" data-marpit-pagination="1" style="--paginate:true;--class:invert;--heading-divider:3;" data-marpit-pagination-total="17">
<h1 id="2-conditionals">2. Conditionals</h1>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="2" data-marpit-fragments="10" data-paginate="true" data-class="invert" data-heading-divider="3" lang="en-US" class="invert" data-marpit-pagination="2" style="--paginate:true;--class:invert;--heading-divider:3;" data-marpit-pagination-total="17">
<h2 id="comparison-operators">Comparison operators</h2>
<ul>
<li data-marpit-fragment="1">Comparison operators are used to compare two variables
<ul>
<li data-marpit-fragment="2">They return either <code>true</code> or <code>false</code></li>
</ul>
</li>
<li data-marpit-fragment="3">Two variables of any type can be compared with equality operators
<ul>
<li data-marpit-fragment="4">Equal to: <code>a == b</code></li>
<li data-marpit-fragment="5">Not equal to: <code>a != b</code></li>
</ul>
</li>
<li data-marpit-fragment="6">Two <strong>numbers</strong> can be further compared with less/greater operators:
<ul>
<li data-marpit-fragment="7">Less than: <code>a < b</code></li>
<li data-marpit-fragment="8">Less than or equal: <code>a <= b</code></li>
<li data-marpit-fragment="9">Greater than: <code>a > b</code></li>
<li data-marpit-fragment="10">Greater than or equal: <code>a >= b</code></li>
</ul>
</li>
</ul>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="3" data-paginate="true" data-class="invert" data-heading-divider="3" lang="en-US" class="invert" data-marpit-pagination="3" style="--paginate:true;--class:invert;--heading-divider:3;" data-marpit-pagination-total="17">
<h2 id="if-else-if-and-else"><code>if</code>, <code>else if</code>, and <code>else</code></h2>
<ul>
<li>Checks truthfulness of a given statement</li>
<li>The statements are checked in order, and the first <code>true</code> condition is executed</li>
</ul>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-c#"><span class="hljs-built_in">float</span> temperatureInOulu = <span class="hljs-number">2.3f</span>;
<span class="hljs-built_in">float</span> temperatureInIvalo = <span class="hljs-number">-10.9f</span>;
<span class="hljs-keyword">if</span> (temperatureInOulu > temperatureInIvalo)
{
Debug.Log(<span class="hljs-string">"Oulu is warmer than Ivalo"</span>);
}
<span class="hljs-keyword">else</span> <span class="hljs-keyword">if</span> (temperatureInOulu < temperatureInIvalo)
{
Debug.Log(<span class="hljs-string">"Ivalo is warmer than Oulu"</span>);
}
<span class="hljs-keyword">else</span>
{
Debug.Log(<span class="hljs-string">"Oulu and Ivalo have the same temperature"</span>);
}
</code></pre>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="4" data-paginate="true" data-class="invert" data-background-color="#29366f" data-heading-divider="3" lang="en-US" class="invert" data-marpit-pagination="4" style="--paginate:true;--class:invert;--background-color:#29366f;--heading-divider:3;background-color:#29366f;background-image:none;" data-marpit-pagination-total="17">
<h2 id="exercise-1-sauna-temperature">Exercise 1: Sauna temperature</h2>
<p>Print one of the messages from this sauna thermometer according to value of variable <code>temperatureInSauna</code>:</p>
<p><img src="imgs/sauna.png" alt="" style="width:600px;" /></p>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="5" data-marpit-fragments="2" data-paginate="true" data-class="invert" data-heading-divider="3" lang="en-US" class="invert" data-marpit-pagination="5" style="--paginate:true;--class:invert;--heading-divider:3;" data-marpit-pagination-total="17">
<h3 id="single-statement-if">Single statement if</h3>
<ul>
<li data-marpit-fragment="1">
<p>If you only have one statement inside the <code>if</code> statement, curly braces can be left out</p>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-c#"><span class="hljs-keyword">if</span> (temperatureInOulu > temperatureInIvalo)
{
Debug.Log(<span class="hljs-string">"Oulu is warmer than Ivalo"</span>);
}
</code></pre>
<p>is the same as</p>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-c#"><span class="hljs-keyword">if</span> (temperatureInOulu > temperatureInIvalo)
Debug.Log(<span class="hljs-string">"Oulu is warmer than Ivalo"</span>);
</code></pre>
</li>
<li data-marpit-fragment="2">
<p>You can even write the statement and the block to the same line!</p>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-c#"><span class="hljs-keyword">if</span> (baa > <span class="hljs-number">20</span>) Debug.Log(<span class="hljs-string">"Baa"</span>);
<span class="hljs-keyword">else</span> Debug.Log(<span class="hljs-string">"Not baa!"</span>);
</code></pre>
</li>
</ul>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="6" data-marpit-fragments="1" data-paginate="true" data-class="invert" data-heading-divider="3" lang="en-US" class="invert" data-marpit-pagination="6" style="--paginate:true;--class:invert;--heading-divider:3;" data-marpit-pagination-total="17">
<h2 id="not-operator">Not operator <code>!</code></h2>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-c#"><span class="hljs-built_in">bool</span> itsColdOutside = <span class="hljs-literal">true</span>;
</code></pre>
<ul>
<li data-marpit-fragment="1">
<p><code>!</code> in front of a boolean value flips it from <code>true</code> to <code>false</code>, and vice versa</p>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-c#"><span class="hljs-keyword">if</span> (!itsColdOutside)
Debug.Log(<span class="hljs-string">"It's warm outside."</span>);
</code></pre>
<p>is the same as</p>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-c#"> <span class="hljs-keyword">if</span> (itsColdOutside == <span class="hljs-literal">false</span>)
Debug.Log(<span class="hljs-string">"It's warm outside."</span>);
</code></pre>
</li>
</ul>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="7" data-marpit-fragments="3" data-paginate="true" data-class="invert" data-heading-divider="3" lang="en-US" class="invert" data-marpit-pagination="7" style="--paginate:true;--class:invert;--heading-divider:3;" data-marpit-pagination-total="17">
<h2 id="assignment-operators">Assignment operators</h2>
<ul>
<li data-marpit-fragment="1">
<p>We have used the assignment operator <code>=</code> for assigning values for variables</p>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-c#"><span class="hljs-built_in">int</span> x;
x = <span class="hljs-number">25</span>;
</code></pre>
</li>
<li data-marpit-fragment="2">
<p><em>Notice the difference between <code>=</code> and the conditional <code>==</code>!</em></p>
<ul>
<li data-marpit-fragment="3"><code>=</code> is used for <strong>assigning</strong> values for variables, <code>==</code> is used for <strong>comparing</strong> values</li>
</ul>
</li>
</ul>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="8" data-marpit-fragments="5" data-paginate="true" data-class="invert" data-heading-divider="3" lang="en-US" class="invert" data-marpit-pagination="8" style="--paginate:true;--class:invert;--heading-divider:3;" data-marpit-pagination-total="17">
<h3 id="assignment-shorthands">Assignment Shorthands</h3>
<ul>
<li data-marpit-fragment="1">these three examples do the same thing:
<ul>
<li data-marpit-fragment="2"><code>i = i + 1;</code></li>
<li data-marpit-fragment="3"><code>i += 1;</code></li>
<li data-marpit-fragment="4"><code>i++;</code></li>
</ul>
</li>
<li data-marpit-fragment="5">works similarly for subtraction, multiplication, division, modulo</li>
</ul>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="9" data-marpit-fragments="5" data-paginate="true" data-class="invert" data-heading-divider="3" lang="en-US" class="invert" data-marpit-pagination="9" style="--paginate:true;--class:invert;--heading-divider:3;" data-marpit-pagination-total="17">
<h2 id="logical-operators">Logical operators</h2>
<ul>
<li data-marpit-fragment="1">
<p>The three important logical operators</p>
<ul>
<li data-marpit-fragment="2">not: <code>!a</code></li>
<li data-marpit-fragment="3">and: <code>a && b</code></li>
<li data-marpit-fragment="4">or: <code>a || b</code></li>
</ul>
</li>
<li data-marpit-fragment="5">
<p>They can be used for more complicated logic</p>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-c#"><span class="hljs-built_in">int</span> a = <span class="hljs-number">1</span>;
<span class="hljs-built_in">int</span> b = <span class="hljs-number">3</span>;
<span class="hljs-built_in">int</span> c = <span class="hljs-number">5</span>;
Debug.Log(a < b && a < c); <span class="hljs-comment">// prints true</span>
</code></pre>
</li>
</ul>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="10" data-marpit-fragments="2" data-paginate="true" data-class="invert" data-heading-divider="3" lang="en-US" class="invert" data-marpit-pagination="10" style="--paginate:true;--class:invert;--heading-divider:3;" data-marpit-pagination-total="17">
<h3 id="logical-operator-example">Logical operator example</h3>
<ul>
<li data-marpit-fragment="1">
<p>So, instead of nesting <code>if</code> statements like this:</p>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-c#"><span class="hljs-keyword">if</span> (PlayerHealth > <span class="hljs-number">0</span>)
<span class="hljs-keyword">if</span> (PressedJumpButton)
PlayerJump();
</code></pre>
</li>
<li data-marpit-fragment="2">
<p>Use the <code>&&</code> ("and") operator:</p>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-c#"><span class="hljs-keyword">if</span> (PlayerHealth > <span class="hljs-number">0</span> && PressedJumpButton)
PlayerJump();
</code></pre>
</li>
</ul>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="11" data-paginate="true" data-class="invert" data-background-color="#5d275d" data-heading-divider="3" lang="en-US" class="invert" data-marpit-pagination="11" style="--paginate:true;--class:invert;--background-color:#5d275d;--heading-divider:3;background-color:#5d275d;background-image:none;" data-marpit-pagination-total="17">
<h2 id="extra-conditional-switch-case-statement">Extra conditional: Switch-case statement</h2>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-c#"><span class="hljs-keyword">public</span> <span class="hljs-built_in">int</span> intelligence = <span class="hljs-number">5</span>;
<span class="hljs-function"><span class="hljs-keyword">void</span> <span class="hljs-title">Greet</span>()</span>
{
<span class="hljs-keyword">switch</span> (intelligence)
{
<span class="hljs-keyword">case</span> <span class="hljs-number">5</span>:
Debug.Log(<span class="hljs-string">"Why hello there good sir! Let me teach you about Trigonometry!"</span>);
<span class="hljs-keyword">break</span>;
<span class="hljs-keyword">case</span> <span class="hljs-number">4</span>:
Debug.Log(<span class="hljs-string">"Hello and good day!"</span>);
<span class="hljs-keyword">break</span>;
<span class="hljs-keyword">case</span> <span class="hljs-number">3</span>:
Debug.Log(<span class="hljs-string">"Whadya want?"</span>);
<span class="hljs-keyword">break</span>;
<span class="hljs-keyword">case</span> <span class="hljs-number">2</span>:
Debug.Log(<span class="hljs-string">"Grog SMASH!"</span>);
<span class="hljs-keyword">break</span>;
<span class="hljs-keyword">case</span> <span class="hljs-number">1</span>:
Debug.Log(<span class="hljs-string">"Ulg, glib, Pblblblblb"</span>);
<span class="hljs-keyword">break</span>;
<span class="hljs-literal">default</span>:
Debug.Log(<span class="hljs-string">"Incorrect intelligence level."</span>);
<span class="hljs-keyword">break</span>;
}
}
</code></pre>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="12" data-marpit-fragments="1" data-paginate="true" data-class="invert" data-background-color="#5d275d" data-heading-divider="3" lang="en-US" class="invert" data-marpit-pagination="12" style="--paginate:true;--class:invert;--background-color:#5d275d;--heading-divider:3;background-color:#5d275d;background-image:none;" data-marpit-pagination-total="17">
<h2 id="extra-conditional-switch-expression">Extra conditional: Switch expression</h2>
<ul>
<li data-marpit-fragment="1">
<p>There's an even shorter way to create a switch statement nowadays - <em><strong>switch expression</strong></em>:</p>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-c#"><span class="hljs-built_in">string</span> saunaMessage = temperatureInSauna <span class="hljs-keyword">switch</span>
{
<= <span class="hljs-number">20</span> => <span class="hljs-string">"Vilulla hyräättää"</span>,
> <span class="hljs-number">20</span> <span class="hljs-keyword">and</span> <= <span class="hljs-number">40</span> => <span class="hljs-string">"Väljhoosut poes"</span>,
> <span class="hljs-number">40</span> <span class="hljs-keyword">and</span> <= <span class="hljs-number">60</span> => <span class="hljs-string">"Eepä tule yskä"</span>,
> <span class="hljs-number">60</span> <span class="hljs-keyword">and</span> <= <span class="hljs-number">80</span> => <span class="hljs-string">"Saanassako myö ollaan?"</span>,
> <span class="hljs-number">80</span> <span class="hljs-keyword">and</span> <= <span class="hljs-number">100</span> => <span class="hljs-string">"*Insert vihta kuva here*"</span>,
> <span class="hljs-number">100</span> => <span class="hljs-string">"Ovi aaki ja justiisai"</span>
};
Debug.Log(saunaMessage);
</code></pre>
</li>
</ul>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="13" data-marpit-fragments="2" data-paginate="true" data-class="invert" data-background-color="#5d275d" data-heading-divider="3" lang="en-US" class="invert" data-marpit-pagination="13" style="--paginate:true;--class:invert;--background-color:#5d275d;--heading-divider:3;background-color:#5d275d;background-image:none;" data-marpit-pagination-total="17">
<h2 id="extra-conditional-ternary-operator">Extra conditional: Ternary operator</h2>
<ul>
<li data-marpit-fragment="1">"Inline if" is done with the ternary operator
<ul>
<li data-marpit-fragment="2">
<p><code>(the if statement) ? (if true) : (if false);</code></p>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-c#">message = health > <span class="hljs-number">0</span> ? <span class="hljs-string">"Player is Alive"</span> : <span class="hljs-string">"Player is Dead"</span>;
</code></pre>
</li>
</ul>
</li>
</ul>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="14" data-marpit-fragments="3" data-paginate="true" data-class="invert" data-heading-divider="3" lang="en-US" class="invert" data-marpit-pagination="14" style="--paginate:true;--class:invert;--heading-divider:3;" data-marpit-pagination-total="17">
<h2 id="strings">Strings</h2>
<ul>
<li data-marpit-fragment="1">
<p>String is a variable containing block of text</p>
<ul>
<li data-marpit-fragment="2">(Actually, a special type of variable containing an <a href="2-lists-loops"><em>array</em></a> of characters)</li>
</ul>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-c#"><span class="hljs-built_in">string</span> name = <span class="hljs-string">"Matti Teppo"</span>;
</code></pre>
</li>
<li data-marpit-fragment="3">
<p>You can <em>concatenate</em> (combine) multiple strings with the <code>+</code> operator:</p>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-c#"><span class="hljs-built_in">string</span> firstName = <span class="hljs-string">"Matti"</span>;
<span class="hljs-built_in">string</span> lastName = <span class="hljs-string">"Teppo"</span>;
<span class="hljs-built_in">string</span> fullName = firstName + <span class="hljs-string">" "</span> + lastName;
Debug.Log(fullName); <span class="hljs-comment">// Outputs "Matti Teppo"</span>
</code></pre>
</li>
</ul>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="15" data-marpit-fragments="3" data-paginate="true" data-class="invert" data-heading-divider="3" lang="en-US" class="invert" data-marpit-pagination="15" style="--paginate:true;--class:invert;--heading-divider:3;" data-marpit-pagination-total="17">
<h2 id="special-characters">Special characters</h2>
<ul>
<li data-marpit-fragment="1">
<p>Special <em>character constants</em> are preceded by a backslash <code>\</code></p>
<ul>
<li data-marpit-fragment="2">Can be used for formatting strings</li>
<li data-marpit-fragment="3">The most used one, <code>\n</code> represents a <strong>newline</strong>, a.k.a. a line break</li>
</ul>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-c#"><span class="hljs-built_in">string</span> firstName = <span class="hljs-string">"Matti"</span>;
<span class="hljs-built_in">string</span> lastName = <span class="hljs-string">"Teppo"</span>;
<span class="hljs-built_in">string</span> fullName = firstName + <span class="hljs-string">"\n"</span> + lastName;
Debug.Log(fullName);
<span class="hljs-comment">/* This outputs:
Matti
Teppo
*/</span>
</code></pre>
</li>
</ul>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="16" data-marpit-fragments="4" data-paginate="true" data-class="invert" data-heading-divider="3" lang="en-US" class="invert" data-marpit-pagination="16" style="--paginate:true;--class:invert;--heading-divider:3;" data-marpit-pagination-total="17">
<h2 id="string-interpolation">String interpolation</h2>
<ul>
<li data-marpit-fragment="1">
<p>Concatenating multiple variables into one string with <code>+</code> quickly becomes tedious</p>
</li>
<li data-marpit-fragment="2">
<p>It's much easier to use <strong>string interpolation</strong></p>
<ul>
<li data-marpit-fragment="3">Start a string with <code>$</code>, enclose variables in <code>{</code> curly braces <code>}</code><pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-c#"><span class="hljs-built_in">string</span> animal = <span class="hljs-string">"Dog"</span>;
<span class="hljs-built_in">string</span> sound = <span class="hljs-string">"Woof"</span>;
Debug.Log(<span class="hljs-string">$"<span class="hljs-subst">{animal}</span> says <span class="hljs-subst">{sound}</span>!"</span>);
<span class="hljs-comment">// Outputs "Dog says Woof!"</span>
</code></pre>
</li>
</ul>
</li>
<li data-marpit-fragment="4">
<p>Very useful e.g., for printing multiple variables in one log statement:</p>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-c#">Debug.Log(<span class="hljs-string">$"variable 1: <span class="hljs-subst">{variable1}</span>, variable 2: <span class="hljs-subst">{variable2}</span>"</span>);
</code></pre>
</li>
</ul>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="17" data-marpit-fragments="4" data-paginate="true" data-class="invert" data-background-color="#29366f" data-heading-divider="3" lang="en-US" class="invert" data-marpit-pagination="17" style="--paginate:true;--class:invert;--background-color:#29366f;--heading-divider:3;background-color:#29366f;background-image:none;" data-marpit-pagination-total="17">
<h2 id="exercise-2-gameobject-check">Exercise 2: GameObject check</h2>
<p>Create a C# script that checks if the GameObject is</p>
<ul>
<li data-marpit-fragment="1">a player or</li>
<li data-marpit-fragment="2">an enemy.</li>
</ul>
<p>Give the GameObject a string variable <code>EntityType</code> that tells which of the two it is.</p>
<ul>
<li data-marpit-fragment="3">
<p>Depending on its value,<br />
a) Set the HP value of the GameObject to 50 or 10.<br />
b) print to console either <code>"I am Player! My HP is 50!"</code> or <code>"I am Enemy! My HP is 10!"</code></p>
</li>
<li data-marpit-fragment="4">
<p>What happens if<br />
a) EntityType is something else<br />
b) EntityType is not declared at all?</p>
</li>
</ul>
</section>
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