PHP | Check if a number is Even or Odd

In this PHP program, we are going to check whether a given number is an EVEN number of an ODD number.
Submitted by IncludeHelp, on January 05, 2018 [Last updated : March 12, 2023]

Given a number and we have to check whether it is an EVEN number of an ODD number using PHP Code.

EVEN/ODD Numbers

EVEN numbers are the numbers which are divisible by 2, like: 2, 4, 6, 8, 10, etc, and the ODD numbers are not divisible by 2, like: 3, 5,7, 9, 1 etc

Example

    Input: 12
    Output: 12 is an EVEN number
    12 is divisible by 2, it returns remainder 0

    Input: 13
    Output: 13 is an ODD number
    13 is not divisible by 2, because it returns remainder 1

PHP code to check if a number is Even or Odd

<?php
   //program to check EVEN or ODD
   //function: isEvenOrOdd
   //description: This function will check
   //whether a given number is EVEN or ODD
   function isEvenOrOdd($num){
        //if num is divisible by 2 than
        //it will be an EVEN number or it 
        //will be an ODD number
        if( $num % 2 == 0)
            return 1; //will check as EVEN number
        else
            return 0; //will check as ODD number
   }
   
   //main code to test the function
   $number = 12;
   if(isEvenOrODD($number))
        print_r($number." is EVEN number");
   else
        print_r($number." is ODD number");

    print_r("\n");
    
    //again check with an ODD number
   $number = 13;
   if(isEvenOrODD($number))
        print_r($number." is EVEN number");
   else
        print_r($number." is ODD number");    
?>

Output

12 is EVEN number
13 is ODD number

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