How to create factorial calculator

Answer 1

java one liner
import java.util.Scanner;
public class Program
{
public static void main(String[] args) {
int a=1;for(int c=new Scanner(System.in).nextInt(),b=1;b<c;a+=(a*b),b++);System.out.println(a);
}
}

Answer 2

either that or...
https://code.sololearn.com/cqfl1nmGprm4/?ref=app
;)

Answer 3

have a variable "x" initialized to 1, then iterate from 2 to n (inclusive, n being the number you want to calculate the factorial of) and multiply x by each.