| [Overview][Constants][Types][Classes][Procedures and functions][Index] |
Check whether value is Not a Number
Source position: math.pp line 226
function IsNan( |
const d: Single |
):Boolean; overload; |
const d: Double |
):Boolean; overload; |
const d: Extended |
):Boolean; overload; |
IsNan returns True if the double d contains Not A Number (a value which cannot be represented correctly in double format).
|
Check whether value is zero |
|
|
Check whether value is infinite |