[Overview][Constants][Types][Classes][Procedures and functions][Index] Reference for unit 'math' (#rtl)

IsNan

Check whether value is Not a Number

Declaration

Source position: math.pp line 207

function IsNan(

  const d: Double

):Boolean; overload;

Description

IsNan returns True if the double d contains Not A Number (a value which cannot be represented correctly in double format).

See also

IsZero

  

Check whether value is zero

IsInfinite

  

Check whether value is infinite

The latest version of this document can be found at lazarus-ccr.sourceforge.net.