Write a Program in C++ which calculates the factorial of a number using recursion.

Coding:- 

#include<iostream.h>

int fact (int n)

{
int value=1;

if(n==1)

return(value);

else
{
                               value=n*fact(n-1);
                                return(value);
}

}
main()

{
int fact(int);

int f, n;

cout<<"enter a number=";

cin>>n ;

f=fact(n);

cout<<"factorial of a number is ="<<f<<"\n";


}

Output:-