Cpp program to find the factorial of a number

Write a program in C++ to find the factorial of a number.

#include<iostream>
using namespace std;
int main(){
     int num,fact=1;
    cout<<"Enter any number to find it's factorial"<<endl;
    cin>>num;
    for(int a=1;a<=num;a++)
    {
          fact=fact*a;
    }
    cout<<"The factorial of "<<num<<"is "<<fact;
     return 0;
}

Enter any number to find it's factorial

5

The factorial of 5 is 120