Calculation of Factorial Using Recursion

//Calculation of Factorial using functions

#include <stdio.h>

#include <conio.h>

long f(int);//Declaration of function f with return type long and one parameter as integer type

void main()

{

  int n;

  long fact = 1;//Initialization of fact = 1

  clrscr();

  printf("Enter any positive integer value\n");

  scanf("%d", &n);

  printf("Factorial of a number is = %ld\n",f(n));//%ld stands for long

  getch();

}
//body of the function

long f(int n)

{

  int i;

  long res = 1;

  for (i = 1; i <= n; i++)

  res = res * i;

  return res;

}