find sum of even numbers and sum of odd numbers from 1 to 100 java code example

Example 1: Java program to calculate sum of even and odd numbers in an array

// Java program to calculate sum of even and odd numbers in an array
import java.util.Scanner;
public class FindSumOf
{
   public static void main(String[] args)
   {
      int number, sumEven = 0, sumOdd = 0;
      Scanner sc = new Scanner(System.in);
      System.out.println("Please enter number of elements in an array: ");
      number = sc.nextInt();
      int[] arrNumbers = new int[number];
      System.out.println("Please enter elements of the array: ");
      for(int a = 0; a < number; a++)
      {
         arrNumbers[a] = sc.nextInt();
      }
      for(int a = 0; a < number; a++)
      {
         if(arrNumbers[a] % 2 == 0)
         {
            sumEven = sumEven + arrNumbers[a];
         }
         else
         {
            sumOdd = sumOdd + arrNumbers[a];
         }
      }
      System.out.println("Sum of even numbers in an array: " + sumEven);
      System.out.println("Sum of odd numbers in an array : " + sumOdd);
      sc.close();
   }
}

Example 2: Java program to find the sum of all even numbers from 1 to 10

int sum = 0;
for (int i = 1; i <= 10; i++) {
// Logic for sum of EVEN
	if (i % 2 == 0) {
		sum = sum + i;
		}
}
System.out.println("Sum of all even from 1 to 10 is: " + sum);