Modern Pascal Built-in Constants

Constants have permanent values of predefined Data types, having defined meaning and storage associated with each.

Scalar Standard

• False is of type Boolean.
• True is of type Boolean.
• On is of alias type Boolean.
• Off is of alias type Boolean.
• Yes is of alias type Boolean.
• No is of alias type Boolean.
  
• IsFilenameCaseSensitive is of type Boolean.
• ControlZMarksEOF is of type Boolean.
  
• LineEnding is of type String.
• AllFilesMask is of type String.
• DriveSeperator is of type Character.
  
• DirectorySeperator is of type Character.
• PathSeperator is of type Character.
• MaxPathLength is of type Longint.
• HoursPerDay is of type Longint.
• MinsPerHour is of type Longint.
• SecsPerMin is of type Longint.
• MSecsPerSec is of type Longint.
• DateDelta is of type Longint.
• MaxInt is of type Longint.
• MinInt is of type Longint.
• MaxLongint is of type Longint.
• MinLongint is of type Longint.
• MaxSmallint is of type Smallint.
• MinSmallint is of type Smallint.
• MaxShortint is of type Shortint.
• MinShortint is of type Shortint.
• MaxLargeint is of type Largeint.
• MinLargeint is of type Largeint.
• MaxSingle is of type Single.
  
• MinSingle is of type Single.
• MaxDouble is of type Double.
• MinDouble is of type Double.
• MaxExtended is of type Extended.
• MinExtended is of type Extended.
• MaxCurrency is of type Currency.
• MinCurrency is of type Currency.
• MaxFloat is of type Extended.
• MinFloat is of type Extended.
• __VERSION__ of type of String.
  
• __BUILD__ of type of String.
  
• __ENGINE__ of type of String.
  

Pointer

• NilHandle is of type pointer.
  
• Nil is of type Pointer, as in unassigned.
• Null is of type Pointer, as in unassigned.
  

Addition Constants

Modern Pascal has units (like libraries or modules in other languages) which also incorporate their own constants and types. The list above is the constants that are automatically included in every project.