Factorial Program in PHP with example

Hi friends, in this tutorial, you will learn how to run the factorial program in PHP. I will explain the details in a step-by-step process. This is a very simple program and you will never forget it if you read this article once.

Also, read the OOPs concept in PHP with real-time examples

Steps to writing the factorial program in PHP

Step 1:- First of all, enter the input value in the HTML form.

Step 2:- Now, we will receive the input value with the help of $_POST superglobal variable for which the factorial will be calculated.

Step 3:- Next, we will declare some variables as shown below

$fact = ""; $factorial_number_err = "";

Step 4:- Now, we will check if the input value is not empty then we will run a for loop up to the number we have received from the HTML form.

Step 5:- Now, each of the incremented values of the for loop will be multiplied with the $fact variable in every iteration and store the result in the $fact variable as shown below

Suppose you have to find a factorial of 5, then the for loop will be executed up to 5.

• For '1', the value of the fact variable will be fact = fact*1 i.e. fact = 1*1 and it becomes…