Delphi Basics : IsInfinite command

DelphiBasics

IsInfinite
Function

Checks whether a floating point number is infinite

Math unit

function IsInfinite(const FloatNumber Double):Boolean;

Description

The IsInfinite function returns True if FloatNumber is infinite in value.

Related commands

Infinity		Floating point value of infinite size
IsNaN		Checks to see if a floating point number holds a real number
NaN		Not a real number

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Example code : Assign Infinity to a number and then test using IsInfinite

var
  float : Double;

begin
  // Set the number to infinity
  float := Infinity;    // Equivalent to 1.0/0.0

  // Although infinite, we can still display it
  ShowMessage('float = '+FloatToStr(float));

  // And we can test to see if it is infinite
  if IsInfinite(float)
  then ShowMessage('float is infinite')
  else ShowMessage('float = '+FloatToStr(float));
end;

Show full unit code

float = INF
float is infinite