PHP Program to find LCM

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What is Least Common Multiple?

A smallest common multiple of two or more integers.

In general, Least Common Multiple (LCM) is otherwise called as Lowest Common Multiple (LCM) or Smallest Common Multiple (SCM)

Tips: It is recommended to use our online LCM calculator for better understanding.


The following table provides few examples of LCM of the given numbers.

4, 1020
6, 530
15, 30 , 4590

LCM of Two Numbers

n the following example, we will find the LCM of the given two numbers (45, 90).


PHP Compiler
<?php $num1 = 45; $num2 = 90; $max = ($num1 > $num2) ? $num1: $num2; while(1) { if(($max % $num1 == 0) && ($max % $num2 == 0)) { echo "LCM of $num1 and $num2: $max <br>"; break; } ++$max; } ?>


LCM of 45 and 90: 90


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