System.Math.CompareValue
Delphi
function CompareValue(const A, B: Extended; Epsilon: Extended): TValueRelationship; function CompareValue(const A, B: Double; Epsilon: Double): TValueRelationship; function CompareValue(const A, B: Single; Epsilon: Single): TValueRelationship; function CompareValue(const A, B: Integer): TValueRelationship; function CompareValue(const A, B: Int64): TValueRelationship; function CompareValue(const A, B: UInt64): TValueRelationship;
C++
extern DELPHI_PACKAGE System::Types::TValueRelationship __fastcall CompareValue(const System::Extended A, const System::Extended B, 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
Returns the relationship between two numeric values.
Call CompareValue to determine the relationship between two numeric values. When comparing floating-point values, CompareValue lets you specify a maximum difference to use when comparing values, so that they are considered the same if they are within that amount.
A and B are the values to compare.
Epsilon is the maximum amount by which A and B can differ and still be considered the same value.
CompareValue returns
LessThanValue if A is less than B (by more than Epsilon if A and B are floating-point numbers).
EqualsValue if A is equivalent to B (the same, or within Epsilon if A and B are floating-point numbers).
GreaterThanValue if A is larger than B (by more than Epsilon if A and B are floating-point numbers).