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

# TQWordHelper

[Properties (by Name)] [Methods (by Name)] [Events (by Name)]

Helper for a QWord-typed ordinal value

## Declaration

Source position: syshelph.inc line 559

`type TQWordHelper = type helper`
`public`
`Const`
`MaxValue = 18446744073709551615` |  | Maximum value for a QWord
`MinValue = 0` |  | Minimum value for a QWord
`class function Parse();` |  | Convert from a string
`class function Size;` |  | Size, in bytes, of the QWord value
`class function ToString();` |  | Convert the value to string
`class function TryParse();` |  | Try to convert a string to a QWord, report success or failure
`function ToBoolean;` |  | Convert to a boolean value
`function ToDouble;` |  | Convert to a double-sized floating point value
`function ToExtended;` |  | Convert to an extended-sized floating point value
`function ToBinString;`
`function ToHexString();` |  | Convert to a hexadecimal string representation
`function ToSingle;` |  | Convert to an single-sized floating point value
`function SetBit();`
`function ClearBit();`
`function ToggleBit();`
`function TestBit();`
`end;`

## Inheritance

`TQWordHelper` |  | Helper for a QWord-typed ordinal value

## Description

TQWordHelper contains some auxiliary routines for a QWord-typed ordinal value. It consists mainly of conversion routines to and from other types.

## See also

TStringHelper |  | Helper type for strings.
TShortIntHelper |  | Helper for a ShortInt-typed ordinal value
TSmallIntHelper |  | Helper for a SmallInt-typed ordinal value
TWordHelper |  | Helper for a Word-typed ordinal value
TCardinalHelper |  | Helper for a Cardinal-typed ordinal value
TIntegerHelper |  | Helper for a Integer-typed ordinal value
TInt64Helper |  | Helper for a Int64-typed ordinal value
TByteHelper |  | Helper for a byte-typed ordinal value
TNativeIntHelper |  | Helper for a NativeInt-typed ordinal value
TNativeUIntHelper |  | Helper for a NativeUInt-typed ordinal value