To check odd or even using bitwise operator - PHP - Codereplica - Web & Mobile App Development,E-commerce,Micro-Sites

We read in math Odd and Even numbers that is Odd numbers are whole numbers that cannot be divided exactly into pairs and Any number that can be exactly divided by 2 is called as an even number.
Example :
Odd Number – 1, 3, 5, 7, 9, 11, 13, 15……
Even Number – 2, 4, 6, 8, 10, 12, 14, 16…..

Before going to solution first lets see what is bitwise operator.

Bitwise operators are used for manipulating a data at the bit level that is 0(zero) and 1(one).

Basically there are two methods in bitwise operator that is “Bitwise AND(&) operator” and “Bitwise OR(|) operator.

Here i’m going to use “Bitwise AND(&) operator”.

/* Bitwise AND (&) operator */
   0 + 0 = 0
   0 + 1 = 0
   1 + 0 = 0
   1 + 1 = 1

In the above code example we see how bitwise & operator works.

Now come to the question by using of bitwise & operator how we determine odd or even number,so let’s see below code –

<?php
$n = "11"; // user input
// 11 in binary = 1011 
// 1 in binary  = 0001
// solving by Bitwise AND operator 
// 1011 & 0001 = 0001  = 1
  if($n & 1 == 1){
    echo "Odd";
   }
    else{
    echo "Even";
   }