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Add Misc questions
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‎BONUS/Misc/CircleArea/CircleArea.java

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/**
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* @author MadhavBahlMD
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* @date 25/01/2019
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*/
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import java.util.Scanner;
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public class CircleArea {
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public static double area (double radius) {
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return Math.PI*radius*radius;
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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("/* ===== Area of Circle ===== */");
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System.out.print("\nEnter the radius: ");
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double radius = input.nextDouble();
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System.out.println("Area of circle is: " + area(radius));
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}
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}

‎BONUS/Misc/CircleArea/README.md

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# Circle Area
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WAP to read the radius and print the area of a circle
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## Solution
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### [Java Implementation](./CircleArea.java)
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```java
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/**
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* @author MadhavBahlMD
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* @date 25/01/2019
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*/
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import java.util.Scanner;
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public class CircleArea {
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public static double area (double radius) {
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return Math.PI*radius*radius;
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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("/* ===== Area of Circle ===== */");
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System.out.print("\nEnter the radius: ");
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double radius = input.nextDouble();
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System.out.println("Area of circle is: " + area(radius));
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}
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}
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```

‎BONUS/Misc/LeapYear/LeapYear.java

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/**
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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 LeapYear {
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public static Boolean checkLeapYear (int year) {
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if ((year%4 == 0 && year%100 != 0) || (year%400 == 0)) return true;
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else return false;
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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("/* ===== Check Leap Year ===== */");
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System.out.print("\nEnter the year: ");
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int year = input.nextInt();
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if (checkLeapYear(year)) System.out.println("Yes, " + year + " is a Leap Year!");
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else System.out.println("No, " + year + " is not a leap year!");
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}
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}

‎BONUS/Misc/LeapYear/README.md

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# Leap Year
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WAP to check whether the given year is a leap year or not
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## Solution
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### [Java Implementation](./LeapYear.java)
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```java
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/**
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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 LeapYear {
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public static Boolean checkLeapYear (int year) {
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if ((year%4 == 0 && year%100 != 0) || (year%400 == 0)) return true;
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else return false;
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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("/* ===== Check Leap Year ===== */");
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System.out.print("\nEnter the year: ");
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int year = input.nextInt();
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if (checkLeapYear(year)) System.out.println("Yes, " + year + " is a Leap Year!");
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else System.out.println("No, " + year + " is not a leap year!");
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}
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}
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```

‎BONUS/Misc/NaturalSum/NaturalSum.java

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/**
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* Natural Sum using recursion
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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 NaturalSum {
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public static int naturalSum (int n) {
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if (n <= 0) return 0;
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else return n+naturalSum(n-1);
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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("/* ===== Sum N Natural Numbers ===== */");
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System.out.print("\nEnter a natural number n: ");
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int n = input.nextInt();
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System.out.println("The sum of first " + n + " natural numbers = " + naturalSum(n));
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}
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}

‎BONUS/Misc/NaturalSum/README.md

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# Natural Sum
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WAP to sum first `n` natural numbers
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## Solution
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### [Java Solution](./NaturalSum.java)
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```java
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/**
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* Natural Sum using recursion
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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 NaturalSum {
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public static int naturalSum (int n) {
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if (n <= 0) return 0;
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else return n+naturalSum(n-1);
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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("/* ===== Sum N Natural Numbers ===== */");
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System.out.print("\nEnter a natural number n: ");
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int n = input.nextInt();
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System.out.println("The sum of first " + n + " natural numbers = " + naturalSum(n));
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}
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}
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```

‎BONUS/Misc/OddEve/OddEven.java

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import java.util.Scanner;
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/**
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* @author MadhavBahlMD
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* @date 25/01/2019
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*/
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public class OddEven {
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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("/* ===== Check Odd/Even ===== */");
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System.out.print("\nEnter the number: ");
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int num = input.nextInt();
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if (num%2 == 0) System.out.println(num + " is Even!");
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else System.out.println(num + " is Odd!");
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}
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}

‎BONUS/Misc/OddEve/README.md

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# Odd Even
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Give a number, write a program to check whether it is odd or even
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## Solution
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### [Java Implementation](./OddEven.java)
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```java
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import java.util.Scanner;
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/**
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* @author MadhavBahlMD
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* @date 25/01/2019
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*/
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public class OddEven {
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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("/* ===== Check Odd/Even ===== */");
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System.out.print("\nEnter the number: ");
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int num = input.nextInt();
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if (num%2 == 0) System.out.println(num + " is Even!");
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else System.out.println(num + " is Odd!");
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}
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}
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```

‎BONUS/Misc/README.md

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# Bonus Problems -- Miscellaneous
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Some Miscellaneous Problems to practise! Keep Coding :)
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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/)

‎BONUS/Misc/SumSquares/README.md

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# Sum Squares
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WAP to print the sum of the series 12+22+32 up to n terms
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## Solution
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### [Java Implementation](./SumSquares.java)
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```java
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import java.util.Scanner;
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public class SumSquares {
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public static int sum (int n) {
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if (n <= 0) return 0;
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else return (n*n) + sum(n-1);
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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("/* ===== Sum of squares of n natural numbers ===== */");
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System.out.print("\nEnter the number n: ");
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int n = input.nextInt();
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System.out.println("sum of squares of " + n + " natural numbers = " + sum(n));
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}
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}
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```

‎BONUS/Misc/SumSquares/SumSquares.java

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/**
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* Sum of squares
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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 SumSquares {
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public static int sum (int n) {
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if (n <= 0) return 0;
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else return (n*n) + sum(n-1);
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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("/* ===== Sum of squares of n natural numbers ===== */");
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System.out.print("\nEnter the number n: ");
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int n = input.nextInt();
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System.out.println("sum of squares of " + n + " natural numbers = " + sum(n));
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}
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}

‎BONUS/OOPS/README.md

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# Bonus Problems -- Miscellaneous
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Some Miscellaneous Problems to practise! Keep Coding :)
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## Questions
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To be added!

‎BONUS/README.md

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### [9. Graphs](./Graphs/README.md)
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- To be added
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### [10. Miscellaneous](./Misc/README.md)
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1.
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### [11. Object Oriented Programming](./OOPS/README.md)

‎BONUS/Recursion/NaturalSum/NaturalSum.java

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/**
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* Natural Sum using recursion
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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 NaturalSum {
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public static int naturalSum (int n) {
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if (n <= 0) return 0;
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else return n+naturalSum(n-1);
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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("/* ===== Sum N Natural Numbers ===== */");
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System.out.print("\nEnter a natural number n: ");
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int n = input.nextInt();
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System.out.println("The sum of first " + n + " natural numbers = " + naturalSum(n));
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}
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}

‎BONUS/Recursion/NaturalSum/README.md

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# Natural Sum
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WAP to sum first `n` natural numbers
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## Solution
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### [Java Solution](./NaturalSum.java)
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```java
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/**
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* Natural Sum using recursion
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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 NaturalSum {
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public static int naturalSum (int n) {
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if (n <= 0) return 0;
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else return n+naturalSum(n-1);
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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("/* ===== Sum N Natural Numbers ===== */");
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System.out.print("\nEnter a natural number n: ");
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int n = input.nextInt();
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System.out.println("The sum of first " + n + " natural numbers = " + naturalSum(n));
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}
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}
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```

‎BONUS/Recursion/README.md

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4. [WAP to calculate the sum of elements in a given integer array using recursion](./ArraySum/)
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5. [WAP to find the nth number in Fibonacci Series using recursion](./Fibonacci/)
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6. [WAP to reverse a string using recursion](./ReverseString/)
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7. [WAP to reverse an integer array using recursion](./ReverseArray/)
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7. [WAP to reverse an integer array using recursion](./ReverseArray/)
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8. [WAP to print the Sum of `n` Natural Numbers](./NaturalSum/)
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9. [WAP to print the Sum of Squares of N natural numbers](./SumSquares/)

‎BONUS/Recursion/SumSquares/README.md

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# Sum Squares
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WAP to print the sum of the series 1^2+2^2+3^2 up to n terms
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## Solution
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### [Java Implementation](./SumSquares.java)
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```java
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import java.util.Scanner;
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public class SumSquares {
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public static int sum (int n) {
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if (n <= 0) return 0;
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else return (n*n) + sum(n-1);
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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("/* ===== Sum of squares of n natural numbers ===== */");
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System.out.print("\nEnter the number n: ");
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int n = input.nextInt();
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System.out.println("sum of squares of " + n + " natural numbers = " + sum(n));
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}
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}
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```

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