In the following PHP program factorial of number 5 is calculated. A recursive function calls itself within the function. What is recursion? When a function calls itself is termed as recursion. Like other languages PHP also supports Recursion. Like using recursion, recursion with user input, without recursion, without recursion with user input. We will learn further using different methods to calculate factorial of the given number using PHP code. Get the multiplication of all the numbers.Get all the numbers starting from 1 up to that number. Get the number whose factorial is to be calculated. The logic behind getting the factorial of the number is as per the following. Now how do we actually find the factorial, we can do it using For example, the factorial of number 5 is:
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