#### Example 1: Sum of Natural Numbers using for loop

public class SumNatural { public static void main(String[] args) { int num = 100, sum = 0; for(int i = 1; i <= num; ++i) { // sum = sum + i; sum += i; } System.out.println("Sum = " + sum); } }

**Output**

Sum = 5050

#### Example 2: Sum of Natural Numbers using while loop

public class SumNatural { public static void main(String[] args) { int num = 50, i = 1, sum = 0; while(i <= num) { sum += i; i++; } System.out.println("Sum = " + sum); } }

**Output**

Sum = 1275