System.Math.IsZero

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Delphi

function IsZero(const A: Extended; Epsilon: Extended): Boolean;
function IsZero(const A: Double; Epsilon: Double): Boolean;
function IsZero(const A: Single; Epsilon: Single): Boolean;

C++

extern DELPHI_PACKAGE bool __fastcall IsZero(const System::Extended A, System::Extended Epsilon = 0.000000E+00)/* overload */;

Properties

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

Description

Indicates when a floating-point variable or expression evaluates to zero, or very close to zero.

Use IsZero to test whether the value specified by A is zero, or differs from zero by at most Epsilon.

If Epsilon = 0, then some reasonable default value is used implicitly. For example, the Double version of IsZero uses the default value:

Epsilon = 1E-12.

See Also

• SameValue

• IsInfinite

• Sign

• Mathematical Routines