Factorial.java

public class Factorial
{
    public static int getFactorial(int number)
    {
        int result = number; //result is the original value
        if (number>1) //while the number is greater than 1
        {
            result *= getFactorial(number-1); //call the same function (recursion) with a modified argument
        }
        else if (number == 1)
            return 1; //this case avoids an infinite recursion
        return result; // get the actual result
    }
    public static void main(String[] args)
    {
        System.out.println(getFactorial(5)); //test case
    }
}