Get Factorial of a Number using PHP

In mathematics, the factorial of a non-negative integer n, denoted by n!, is the product of all positive integers less than or equal to n. For example,



The value of 0! is 1, according to the convention for an empty product.

Read full about factorial  here on wikipedia.



We will use For loop for getting factorial  of  a number, so we just have to decrease value by one and multiply with previous holding temporary value, We have to initiate temporary value with 1.


The Following will be code:

Function oriented way:
<?php
// function defination

function GetFactorial($value)
{
$tempvalue = 1;
for ( $i=$value ; $i>0 ;  $i-- )
{
 $tempvalue *=  $i ;
// this is same as the   $tempvalue =  $tempvalue * $i ;
}
return $tempvalue;
}
// function defination


// getting value by calling

echo "<br/>Factorial of 1 is : ".GetFactorial(3);
echo "<br/>Factorial of 2 is : ".GetFactorial(3);
echo "<br/>Factorial of 3 is : ".GetFactorial(3);
echo "<br/>Factorial of 4 is : ".GetFactorial(4);
echo "<br/>Factorial of 5 is : ".GetFactorial(5);
echo "<br/>Factorial of 6 is : ".GetFactorial(6);
echo "<br/>Factorial of 7 is : ".GetFactorial(7);

// getting value by calling
?>