Java Program to Check Whether a Number is Even or Odd

In this article, we will write two java programs to check whether a number is even or odd. If a number is perfectly divisible by 2 (number % 2 ==0) then the number is called even number, else the number is called odd number.

Perfectly divisible by 2 means that when the number is divided by 2 the remainder is zero. To check for remainder, we use modulus operator in java.

Example 1: Program to check if the number entered by user is even or odd

In this program, we have an int variable num. We are using Scanner class to get the number entered by the user.

Once the entered number is stored in the variable num, we are using if..else statement to check if the number is perfectly divisible by 2 or not. Based on the outcome, it is executing if block (if condition true) or else block (if condition is false).

import java.util.Scanner;
public class JavaExample
{
  public static void main(String args[])
  {
    int num;
    System.out.print("Enter an Integer number: ");

    //The input provided by user is stored in num
    Scanner input = new Scanner(System.in);
    num = input.nextInt();

    // If number is divisible by 2 then it's an even number
    //else it is an odd number
    if ( num % 2 == 0 )
      System.out.println(num+" is an even number.");
    else
      System.out.println(num+" is an odd number.");
  }
}

Output 1:

Output 2:

Example 2: Program to check even odd number using ternary operator

A ternary operator is a one liner replacement of an if-else statement. In this program, we are using the same logic that we have seen above, however instead of using if..else, we are using a ternary operator here.

import java.util.Scanner;
public class JavaExample {

  public static void main(String[] args) {

    Scanner scan = new Scanner(System.in);

    System.out.print("Enter any number: ");
    int num = scan.nextInt();

    //checking if else using ternary operator
    //ternary operator syntax: condition ? expression1 : expression2
    // if condition is true, expression1 executes else expression2
    String evenOrOdd = (num % 2 == 0) ? "even number" : "odd number";

    System.out.println(num + " is an " + evenOrOdd);

  }
}

Output 1: When user enters 32 number.

Enter any number: 32
32 is an even number

Output 2: When user enters 13 number.

Enter any number: 13
13 is an odd number

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