Double.IsNan

Syntax

IsNan(Value: Double): Boolean;

Parameters

Value - checked real value.

Description

The IsNaN method checks if the value of the variable is equal to a fixed non-numerical value. If the variable value is an empty string, the method returns True, otherwise it returns False.

NOTE. The fixed non-numeric value is the result of dividing zero by zero. This value is returned if result of an operation is void.