C program to find factorial using recursion

#include <stdio.h>

//function for factorial

long int factorial(int n)

{  

    if(n==1)    return 1;

    return n*factorial(n-1);

}

int main()

{

    int num;

    long int fact=0;

    printf("Enter an integer number: ");

    scanf("%d",&num);    

    fact=factorial(num);

    printf("Factorial of %d is = %ld",num,fact);

    printf("\n");  

    return 0;

}