System.Math.GetRoundMode

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Delphi

function GetRoundMode: TRoundingMode;

C++

extern DELPHI_PACKAGE TRoundingMode __fastcall GetRoundMode(void);

Properties

Type	Visibility	Source	Unit	Parent
function	public	System.Math.pas System.Math.hpp	System.Math	System.Math

Description

Returns the current floating-point rounding mode.

Call GetRoundMode to ascertain how the floating-point number hardware handles rounding issues. The value of the rounding mode determines certain rules that can affect the result. With the default rounding mode (rmNearest), if X is exactly halfway between two whole numbers, the result is always the even number.

The rounding mode can be any of the following values.

Value	Meaning
rmNearest	Rounds to the closest integer value.
rmDown	Rounds toward negative infinity.
rmUp	Rounds toward positive infinity.
rmTruncate	Truncates the value, rounding positive numbers down and negative numbers up.

See Also

• System.Math.TRoundingMode
• System.Math.SetRoundMode
• System.Get8087CW
• System.GetMXCSR

• Floating-Point Number Control Routines
• About Floating-Point Arithmetic
• Floating-Point Rounding Routines

Code Examples

• SetRoundMode (Delphi)
• SystemRound (Delphi)