DelphiBasics   Home  |  Delphi .net Home  |  System NameSpace

.NET Framework  Namespace References  System     Array   Class    Boolean   Structure    Buffer   Class    Byte   Structure    Char   Structure    Console   Class    Convert   Class    DateTime   Structure    DayOfWeek   Enumeration    Decimal   Structure    Double   Structure    Enum   Class    Environment   Class    Exception   Class    ICloneable   Interface    Int16   Structure    Int32   Structure    Int64   Structure    Math   Class    Object   Class    OperatingSystem   Class    Random   Class    SByte   Structure    Single   Structure    String   Class    TimeSpan   Structure    UInt16   Structure    UInt32   Structure    UInt64   Structure    Version   Class   System.Collections  System.Globalization  System.IO  Articles and Tutorials  Overview of .NET  Delphi and .NET  Winform Applications  ASP .Net Applications  php Web Services  Framework Collections  Framework String Handling  Framework Files and Folders       System.Double Structure    Description The Double structure holds floating point numbers in the range +/-1.79769313486232e308, plus the following extreme values :   PositiveInfinity  Infinity (N/0) NegativeInfinity  -Infinity (-N/0) NaN  Not a number (0/0)   Double complies with IEEE standards for calculations.   Unlike the Decimal structure, rounding can occur with Double value calculations.   Double structures are created dynamically from their definition - there is no Create constructor. The native delphi Double type maps to System.Double.  Methods CompareTo   Compares the current Double value to another Equals   Determines if the current Double equals another IsInfinity   Returns true if a a given Double is +/- infinite in value IsNaN   Returns true if a a given Double has no valid value IsNegativeInfinity   Returns true if a a given Double is - infinite in value IsPositiveInfinity   Returns true if a a given Double is + infinite in value Parse   Converts a string representation of a Double into a Double value ToString   Converts the current Double value to a string  Fields Epsilon    Double    Smallest non-zero +ve value : 4.94065645841247e-324 MinValue    Double    Largest negative value : 1.79769313486232e308 MaxValue    Double    Largest negative value : 1.79769313486232e308 NaN    Double    Not a number : 0/0 NegativeInfinity    Double    -Infinity PositiveInfinity    Double    Infinity  Microsoft MSDN links   System System.double

Delphi Programming © Neil Moffatt . All rights reserved.  |  Home Page