# Find factorial of a number in PHP

Right now, will figure out how to discover factorial of a given number utilizing PHP program?

Given a number and we need to locate its factorial.

Equation to discover factorial: 5! (Factorial of 5) = 5x4x3x2x1 = 120

Example:

``````    Input: 5
Output: 120``````

Program to discover factorial of a number in PHP:

``````<?php
//program to find factorial of a number
//here, we are designing a function that
//will take number as argument and return
//factorial of that number

//function: getFactorial
function getFactorial(\$num){
//declare a variable and assign with 1
\$factorial = 1;
for(\$loop = 1; \$loop <= \$num; \$loop++)
\$factorial = \$factorial * \$loop;
return \$factorial;
}

//Main code to test above function
\$number = 1;
print_r("Factorial of ".\$number. " is = ".getFactorial(\$number). "\n");
\$number = 2;
print_r("Factorial of ".\$number. " is = ".getFactorial(\$number). "\n");
\$number = 3;
print_r("Factorial of ".\$number. " is = ".getFactorial(\$number). "\n");
\$number = 4;
print_r("Factorial of ".\$number. " is = ".getFactorial(\$number). "\n");
\$number = 5;
print_r("Factorial of ".\$number. " is = ".getFactorial(\$number). "\n");
?>``````

Output:

``````Factorial of 1 is = 1
Factorial of 2 is = 2
Factorial of 3 is = 6
Factorial of 4 is = 24
Factorial of 5 is = 120``````
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