factorial-of-a-number-recursion.c

#include <stdio.h>
int factorial(int n);
int main()
{
    int n;
    printf("enter natural number : ");
    scanf("%d",&n);
    printf("%d",factorial(n)); 
    return 0;
}

    int factorial(int n)
    {
     if ( n >= 1 )
     {
        return n * factorial(n-1);
     }  
        else 
        return 1;
    }