is_real(n);
| Argument | Description | 
|---|---|
| n | The argument to check. | 
Returns: Boolean
This function returns whether a given variable is a real number
or not. In some cases you want to check and see if a variable in
GameMaker: Studio holds a real number, and that's when you
would use this function. It does not return the real number
but rather true or false, so a value of, for
example, "fish" for n will return false, but a value of
200 for n will return true.
if is_real(val)
   {
   score += val;
   }
The above code checks the variable "val" to see if it is a real number and if it is it then adds it to the score.