Hey all, Programming newbie here.

I'm programming the Fibbonacci code, but I can't figure out how to set the condition

"if NOT EQUAL to any numerical value"

This is what I have so far:

Thanks for the help in advance!Code:

#include <stdio.h>

#include <conio.h>

long fib(int);

int main()

{

int n;

printf("Enter the Fibbonacci number you would like to view: ");

scanf("%i", &n);

if (WHAT GOES HERE?)

{

printf("Input error.\n");

getch();

}

else if (n<0) {

printf("Fibonacci is undefined for negative integers.\n");

getch();

}

else {

printf("The %i-th Fibonacci number is %ld\n", n, fib(n));

}

getch();

return 0;

}

long fib(int n)

{

if (n == 1 || n == 2)

{

return 1;

}

else

{

return (fib(n-1) + fib(n-2));

}

}

Steel.