src/c/elementaryFunctions/discrete_mathematics/factorial/sfactorials.c


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#include <stdio.h>
#include <math.h>
#include "factorial.h"

float sfactorials(float in)
{
	int i,n;
	long long int fact=1;
	n=(int)in;
    if (n < 0)
        printf("Error! Factorial of a negative number doesn't exist.");
	else if(n>170)
		printf("Inf");
    else
    {
        for(i=1; i<=n; i++)
        {
            fact *= i;
        }
    }

    return fact;
}