Let’s learn java bitwise AND to check a given number is odd or even.

## Java bitwise AND to check a given number is odd or even

Java program to check number is even or odd by using “&” operator is one of the common interview question.

Basically to check if number is even we divide it by 2 and its remainder will be 0. Meanwhile to check if number is odd its remainder will be 1 when divided by 2.

Bitwise AND (&) operator returns bit by bit AND of input values. Here we have to check if last bit is 1.

If last bit is 1 then it is odd else it is even. Also integer numbers are represented as 2’s complement.

Also read – even odd program in java using method

For even number it has 0 as there Least Significant Bit (LSB). Let’s learn to find number even odd using bitwise operator in java,

import java.util.*; public class EvenOddBitwise { static int checkEven(int num) { // if we perform bitwise AND between 1 and "num" result will be 0 return(num & 1); }

public static void main(String[] args) { int number = 501; if(checkEven(number) == 0) { System.out.print("Even number"); } else { System.out.print("Odd number"); } } }

**Output:**

Odd number

Meanwhile we can also check if number is even or odd using division operator ( / ).

Here division operator basically returns quotient. For example, if we take a number and divide by two and multiply result with 2 then the number will be less in case of odd number and equal in case of even number.

int result = number / 2; if(result * 2 == number) { System.out.println("Even number"); }