functions program in c :-9

 Program 9: Implementation of factorial function using non-recursion.

#include < stdio.h >

#include< conio.h >

long factorial(int);

void main()

{

int number;

long fact = 1;

printf("Enter a number to calculate its factorial\n");

scanf("%d", &number);

printf("%d! = %ld\n", number, factorial(number));

getch();

}

long factorial(int n)

{

int c;

long fact = 1;

for (c = 1; c <= n; c++)

{

fact = fact * c;

}

return fact;

}

Output:

Enter a number to calculate its factorial

4

4! = 24