c - Validate parameter for 0 or 1

Question

I have a parameter num of int type, where the user can give it one of two values: 0 or 1.
I can check it using the obvious:

if (num < 0 || num > 1)
    print("The parameter value is incorrect.
");

But I was wondering if there was a better (faster? less code?) to do this?

EDIT
This is some data flow code, so performance is of the essence. I am looking for a faster way to run this check.

Thanks

Answer 1

I'd go on clearness instead of less characters:

if (num != 0 && num != 1){
    print("The parameter value is incorrect.
");
}

when it's 2 AM and you're debugging a program, the last thing you want is to over-think about ranges and bitwise operations.