FINDING FACTORIAL OF A NUMBER

/**
    Program Name: FINDING FACTORIAL

    Description: This Program finds a Factorial of a Given Number

    Author:  Tauqirul Haque
       
*/


long fact(long n);

void main()
{
    long n;
    printf("Enter N : ");
    scanf("%d",&n);
   
    if(n < 0)   //if its a neg number then changing the sign
    {
        n = -n;
    }
   
    printf("The fact of %ld  =  %ld \n\n",n,fact(n));
}

long fact(long n)
{
    if(n==0 || n==1)
    {
        return 1;
    }
    else
    {
        return n*fact(n-1);
    }
}