Java Program to Count Even and Odd Numbers in an Array

Learn how to count even and odd numbers in an array using Java. This program traverses each array element, checks whether it is even or odd using the modulus operator , maintains separate counters, and displays the total count of even and odd numbers.

Code Explanation (Step-by-Step)

  • Creates a Scanner object to read input from the keyboard.
  • Creates an integer array named a to store up to 5 elements.
  • Uses the sc.nextInt() method to read the number of elements from the user and stores the value in the variable n.
  • Traverses a loop to read and process each array element.
  • if (a[i] % 2 == 0) checks whether the current element is divisible by 2. If it is divisible by 2, the number is even; otherwise, it is odd.
  • evenNumber++ is used to increment the even number counter by 1.
  • oddNumber++ is used to increment the odd number counter by 1.
  • Displays the total count of even numbers present in the array.
  • Displays the total count of odd numbers present in the array.
				
					import java.util.Scanner;

public class EvenOddArrayElement {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int i, evenNumber = 0, oddNumber = 0;
		int a[] = new int[5];
		System.out.println("enter the number of elements :- ");
		int n = sc.nextInt();

		System.out.println("enter the elements :-");
		for (i = 0; i < n; i++) {
			a[i] = sc.nextInt();

			if (a[i] % 2 == 0) {
				evenNumber++;
			} else {
				oddNumber++;
			}

		}
		System.out.println("Total numbers of even are :- " + evenNumber);
		System.out.println("Total numbers of odd are :- " + oddNumber);
	}

}

Output :-
enter the number of elements :-
3
enter the elements :-
25
45
80
Total numbers of even are :- 1
Total numbers of odd are :- 2

Check Even and Odd Numbers Using Java 8

				
					import java.util.Arrays;

public class EvenOddCountStream {

	public static void main(String[] args) {

		int[] arr = {25, 45, 80};

		long evenCount = Arrays.stream(arr)
				.filter(n -> n % 2 == 0)
				.count();

		long oddCount = Arrays.stream(arr)
				.filter(n -> n % 2 != 0)
				.count();

		System.out.println("Even Count: " + evenCount);
		System.out.println("Odd Count: " + oddCount);
	}
}

Here are some related Java 8 programs that will help you understand Stream API concepts better:   

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