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Add More Bonus Problems
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‎BONUS/Arrays/README.md

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Some more problems on arrays!
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5-
To Be Added...
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## Questions
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1. [WAP to reverse the given arary](./Reverse/)

‎BONUS/Arrays/Reverse/README.md

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# Array Reversal
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WAP to reverse the given array
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## Solution
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### [Java Implementation](./Reverse.java)
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```java
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/**
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* Array Reversal
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* @author MadhavBahlMD
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* @date 26/01/2019
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*/
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import java.util.Scanner;
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public class Reverse {
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public static void inputArr (int arr[], int num) {
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Scanner input = new Scanner(System.in);
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System.out.println("Enter the elements: ");
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for (int i=0; i<num; i++) {
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System.out.print("arr[" + i + "] = ");
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arr[i] = input.nextInt();
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}
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}
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public static void printArr (int arr[], int num) {
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for (int i=0; i<num; i++)
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System.out.print(arr[i] + " ");
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}
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public static void reverse (int arr[], int num) {
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int temp;
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for (int i=0; i<=num/2; i++) {
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temp = arr[i];
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arr[i] = arr[num-i-1];
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arr[num-i-1] = temp;
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}
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}
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public static void main(String[] args) {
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Scanner input = new Scanner(System.in);
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System.out.println("/* ===== bubble Sort ===== */");
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// Input the array
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System.out.print("\nEnter the number of elements in the array: ");
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int num = input.nextInt();
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int arr[] = new int[num];
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inputArr(arr, num);
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// Print the array
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System.out.print("\nOriginal Array: ");
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printArr(arr, num);
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// Reverse the array
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reverse(arr, num);
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// Print the array
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System.out.print("\n\nReversed Array: ");
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printArr(arr, num);
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}
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}
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```

‎BONUS/Arrays/Reverse/Reverse.java

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/**
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* Array Reversal
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* @author MadhavBahlMD
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* @date 26/01/2019
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*/
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import java.util.Scanner;
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public class Reverse {
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public static void inputArr (int arr[], int num) {
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Scanner input = new Scanner(System.in);
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System.out.println("Enter the elements: ");
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for (int i=0; i<num; i++) {
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System.out.print("arr[" + i + "] = ");
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arr[i] = input.nextInt();
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}
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}
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public static void printArr (int arr[], int num) {
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for (int i=0; i<num; i++)
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System.out.print(arr[i] + " ");
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}
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public static void reverse (int arr[], int num) {
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int temp;
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for (int i=0; i<=num/2; i++) {
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temp = arr[i];
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arr[i] = arr[num-i-1];
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arr[num-i-1] = temp;
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}
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}
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public static void main(String[] args) {
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Scanner input = new Scanner(System.in);
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System.out.println("/* ===== bubble Sort ===== */");
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// Input the array
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System.out.print("\nEnter the number of elements in the array: ");
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int num = input.nextInt();
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int arr[] = new int[num];
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inputArr(arr, num);
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// Print the array
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System.out.print("\nOriginal Array: ");
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printArr(arr, num);
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// Reverse the array
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reverse(arr, num);
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// Print the array
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System.out.print("\n\nReversed Array: ");
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printArr(arr, num);
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}
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}

‎BONUS/Misc/MenuAdd/MenuAdd.java

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import java.util.Scanner;
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class MenuAdd {
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public static void main(String[] args) {
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Scanner input = new Scanner (System.in);
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char choice = 'n';
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do {
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System.out.print("Enter the first number: ");
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int n1 = input.nextInt();
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System.out.print("Enter the second number: ");
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int n2 = input.nextInt();
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System.out.println(n1 + " + " + n2 + " = " + (n1+n2));
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System.out.println("do you want to continue? (y/n)");
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choice = input.next().charAt(0);
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} while (choice == 'y');
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}
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}

‎BONUS/Misc/MenuAdd/README.md

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# Menu Add
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Provide the option of adding two numbers to the user until the user wants to exit
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## Solution
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### [Java Implementation](./MenuAdd.java)
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```java
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import java.util.Scanner;
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class MenuAdd {
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public static void main(String[] args) {
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Scanner input = new Scanner (System.in);
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char choice = 'n';
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do {
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System.out.print("Enter the first number: ");
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int n1 = input.nextInt();
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System.out.print("Enter the second number: ");
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int n2 = input.nextInt();
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System.out.println(n1 + " + " + n2 + " = " + (n1+n2));
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System.out.println("do you want to continue? (y/n)");
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choice = input.next().charAt(0);
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} while (choice == 'y');
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}
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}
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```

‎BONUS/Misc/OddEve/OddEven.class

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‎BONUS/Misc/Patterns/Pattern1.java

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import java.util.Scanner;
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class Pattern1 {
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public static void main(String[] args) {
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Scanner input = new Scanner (System.in);
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System.out.print("Enter n: ");
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int n = input.nextInt();
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for (int i=1; i<=n; i++) {
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for (int j=1; j<=i; j++)
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System.out.print("*");
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System.out.println("");
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}
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}
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}

‎BONUS/Misc/Patterns/Pattern2.java

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import java.util.*;
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class Pattern2 {
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public static void main(String[] args) {
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Scanner input = new Scanner (System.in);
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System.out.print("Enter n: ");
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int n = input.nextInt();
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for (int i=n; i>=1; i--) {
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for (int j=1; j<=i; j++)
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System.out.print(j);
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System.out.println("");
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}
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}
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}

‎BONUS/Misc/Patterns/Pattern3.java

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import java.util.*;
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class Pattern3 {
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public static void main(String[] args) {
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Scanner input = new Scanner (System.in);
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System.out.print("Enter n: ");
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int n = input.nextInt();
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// Upper Triangle
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for (int i=1; i<=n; i++) {
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for (int j=1; j<=i; j++)
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System.out.print(j);
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System.out.println("");
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}
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// Lower Triangle
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for (int i=n; i>=1; i--) {
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for (int j=1; j<=i; j++)
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System.out.print(j);
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System.out.println("");
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}
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}
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}

‎BONUS/Misc/Patterns/README.md

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# Patterns
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Print the following patterns
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## Pattern 1
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```
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input: 5
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output:
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*
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**
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***
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****
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*****
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```
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### [Java Implementation](./Pattern1.java)
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```js
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import java.util.Scanner;
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class Pattern1 {
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public static void main(String[] args) {
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Scanner input = new Scanner (System.in);
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System.out.print("Enter n: ");
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int n = input.nextInt();
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for (int i=1; i<=n; i++) {
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for (int j=1; j<=i; j++)
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System.out.print("*");
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System.out.println("");
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}
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}
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}
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```
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## Pattern 2
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```
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input: n=4
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output:
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1234
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123
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12
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1
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```
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### [Java Implementation](./Pattern2.java)
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```java
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import java.util.*;
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class Pattern2 {
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public static void main(String[] args) {
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Scanner input = new Scanner (System.in);
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System.out.print("Enter n: ");
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int n = input.nextInt();
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for (int i=n; i>=1; i--) {
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for (int j=1; j<=i; j++)
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System.out.print(j);
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System.out.println("");
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}
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}
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}
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```
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## Pattern 3
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```
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input: n=4
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1
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12
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123
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1234
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1234
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123
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12
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1
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```
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### [Java Implementation](./Pattern3.java)
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```java
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import java.util.*;
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class Pattern3 {
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public static void main(String[] args) {
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Scanner input = new Scanner (System.in);
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System.out.print("Enter n: ");
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int n = input.nextInt();
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// Upper Triangle
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for (int i=1; i<=n; i++) {
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for (int j=1; j<=i; j++)
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System.out.print(j);
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System.out.println("");
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}
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// Lower Triangle
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for (int i=n; i>=1; i--) {
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for (int j=1; j<=i; j++)
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System.out.print(j);
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System.out.println("");
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}
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}
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}
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```

‎BONUS/Misc/README.md

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## Questions
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1. [Odd/Even](./OddEve/)
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2. [Area of Circle](./CircleArea)
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3. [Check Leap Year](./LeapYear)
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4. [Sum Natural Numbers](./NaturalSum/)
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5. [Sum of Squares of N natural numbers](./SumSquares/)
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1. [WAP to find whether the given number is odd/even](./OddEve/)
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2. [WAP to find the area of Circle](./CircleArea)
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3. [WAP to check Leap Year](./LeapYear)
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4. [WAP to sum n natural numbers](./NaturalSum/)
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5. [WAP to find sum of squares of N natural numbers](./SumSquares/)
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6. [WAP to reverse the given array](./Reverse/)
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7. [WAP to add 2 numbers unti user explicitly quits](./MenuAdd/)
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8. [Pattern Based Problems](./Patterns/)

‎BONUS/Misc/Reverse/README.md

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# Reverse
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WAP to reverse the given array
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## Solution
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### [Java Implementation](./Reverse.java)
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```java
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public static void reverse (int arr[], int num) {
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int temp;
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for (int i=0; i<=num/2; i++) {
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temp = arr[i];
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arr[i] = arr[num-i-1];
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arr[num-i-1] = temp;
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}
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}
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```

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