factorial formula

Question

how to calculate factorial in c++ ? im using :-

#include <iostream>
using namespace std;

factorial is like when we input n=5, the calculation is 5*4*3*2*1 so the answer is 120

Answer 1

I see, alright thank you very much sir ! :)

Answer 2

~ swim ~
Wow, your explanation is very helpful and clear. Thank you so much sir for your time ! 😊

Answer 3

I'm sorry but I don't understand your code, I'm pretty new in coding.

Answer 4

Thank you so much both of you. I get it. Thank you again for your time ! :)

Answer 5

But one more question, what is the different if I use while and for ?