In this tutorial, we will learn how to check whether a number is even or odd.

What is Even Number ?

A number that is divisible by 2 and results a remainder of 0 is called an Even Number. Examples : 2, 4, 6, 8, ..., 98, 100 etc.

What is Odd Number ?

A number that is divisible by 2 and results a remainder of 1 is called Odd Number Examples : 1, 3, 5, 7, ..., 97, 99 etc.

In java we use modulo operator (represented using % symbol) to determine the remainder.

Algorithm

1Step 1 : Start 
2Step 2 : Read number "n"
3Step 3 : rem =  n % 2 (Initialize remainder as rem) 
4Step 4 : If rem = 0, print Even 
5Step 5 : Else print Odd. 
6Step 6 : End 

Code Implementation

1import java.util.Scanner;
2
3public class EvenOdd {
4
5  public static void main(String[] args) {
6    Scanner sc = new Scanner(System.in);
7    System.out.println("Enter Number :");
8    int number = sc.nextInt();
9    
10    int rem = number % 2 ;
11    if (rem == 0) {
12      System.out.printf("%d is Even\n", number);
13    }else {
14      System.out.printf("%d is Odd\n", number);
15    }
16  }
17}

Output :

1Enter Number : 21
221 is Odd

Output :

1Enter Number : 18
218 is Even