There are various ways to achieve this functionality. But in this article, we’ll be using two ways :

1) Using if and else
2) Using ternary Operator

Java program to check whether a number is even or odd using if and else statement

Program:

import java.util.*;
public class Main
{
  public static void main(String[] args) {
  int number; 
  Scanner ed = new Scanner(System.in); 
  System.out.print("Please enter a number : "); 
  number = ed.nextInt(); 
  if(number%2==0)
  System.out.print(number+" is even");
  else
  System.out.print(number+" is odd"); 
  }
}

Ouput:

In the case of Even:

Please enter a number : 90                                                                                                    

90 is even

In case of Odd:

Please enter a number : 43                                                                                                    

43 is odd

Java program to check whether a number is even or odd using ternary operator

Program:

import java.util.*;
public class Main
{
  public static void main(String[] args) {
  int number; 
  String answer; 
  Scanner ed = new Scanner(System.in); 
  System.out.print("Please enter a number : "); 
  number = ed.nextInt(); 
  answer =(number%2==0)?(number+" is even"):(number+" is odd"); 
  System.out.println(answer);
  }
}

Output:

In case of even :

Please enter a number : 22                                                                                                    

22 is even

In case of Odd :

Please enter a number : 89                                                                                                    

89 is odd

Approach :

1. Using Modulo Operator (%), we can find whether the input is divisible by 2 or not as it would give remainder as 1 otherwise 0
2.  If the remainder is zero, then it would be an even number, otherwise odd