isnan()

Definition

INT isnan ( <FLOAT number> )

Checks if a given value is a number.

It does not check for infinties, use the isinf() function for that.

Parameters

• FLOAT number - The value to check.

Returns

INT : The result of the check

• 0 (false) - The value is a number.
• !0 (true) - The value is NOT a number.