A function to return a sign

Question

I know this will really turn out to be simple, but my brain is just not working. I need a function in C# that will return -1 if the integer passed to the function has a nega

Answer 1

public int SignFunction(int number) {
  return (number > 0) ? 
             1 : (number < 0) ? 
                    -1 : number;
}

Answer 2

return input.CompareTo(0);

Answer 3

int sign = Math.Sign(number);

It already exists.

Answer 4

public int Sign(int number)
{
    if(number==0)
       return 0;
    return number/Math.Abs(number);
}

Answer 5

If Math.Sign did not exist, I would do this:

return x == 0 ? 0 : x / Math.Abs(x);

Answer 6

public int SignFunction( int input )
{
    if( input < 0 ) return -1;
    if( input > 0 ) return 1;
    return 0;
}