factorial c 2b 2b without using function

1#include<bits/stdc++.h>
2#include<stdio.h>
3using namespace std;
4
5int fact(int i){
6	if (i <= 1) return 1;
7  	else return i*fact(i-1);
8}
9
10int main(){
11  	ios::sync_with_stdio(0);
12  	cin.tie(0);
13  	int N;
14  	cin >> N;
15  	cout << fact(N) << "\n";
16  	return 0;
17}

1#include <iostream>
2using namespace std;
3
4int main()
5{
6	unsigned int num; //unsigned is used for not taking negetive values.
7	unsigned long long factorial = 1; //Since the factorial a number can be large, so long long data type is used.
8	cout << "Give me any positive number :	";
9	cin >> num;
10
11	for (int i = 1; i <= num; i++) {
12		factorial = factorial * i;
13	}
14	cout << "Factorial of the given number is: " << factorial;
15}

1#include <iostream> 
2
3//n! = n(n-1)!
4int factorial (int n)
5{
6  if (n ==0)
7  {
8    return 1; 
9  }
10  else 
11  {
12	return n * factorial(n-1); 
13  }
14}