Delphi Basics : Infinity command

DelphiBasics

Infinity
Constant

Floating point value of infinite size

Math unit

const Infinity = 1.0 / 0.0;

Description

The Infinity constant is a special floating point number, marked as infinite in size.

It may be assigned and calculated upon, but use IsInfinite for comparisons.

Related commands

IsInfinite		Checks whether a floating point number is infinite
IsNaN		Checks to see if a floating point number holds a real number
NaN		Not a real number

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Example code : Illustrate use of Infinity

var
  float1, float2 : single;
begin
  float1 := Infinity;
  float2 := 23;

  ShowMessage('float1 = '+FloatToStr(float1));
  ShowMessage('float2 = '+FloatToStr(float2));
  ShowMessage('float1 - float2 = '+FloatToStr(float1 - float2));
  ShowMessage('-float1 = '+FloatToStr(-float1));
end;

Show full unit code

  float1 = INF
  float2 = 23
  float1 - float2 = INF
  -float1 = -INF