Ada Programming/Ada 83

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Ada 83 is the first version of the Ada programming language. It was based in the so called Ada 80, a preliminary version of the language formally known as MIL-STD-1815 (published in December 1980). This standard was refined and standardized by the DoD and ANSI as ANSI/MIL-STD-1815A in February 1983 (note the additional 'A' at the end), which was later adopted by International Organization for Standardization as ISO/IEC 8652:1987.

Language features

Character set

• Identifiers in ASCII (7-Bit)

Summary of features

Keywords

Ada 83 has 63 keywords:

• abort
• abs
• accept
• access
• all
• and
• array
• at
• begin
• body
• case
• constant
• declare
• delay
• delta
• digits
• do
• else
• elsif
• end
• entry
• exception
• exit
• for
• function
• generic
• goto
• if
• in
• is
• limited
• loop
• mod
• new
• not
• null
• of
• or
• others
• out
• package
• pragma
• private
• procedure
• raise
• range
• record
• rem
• renames
• return
• reverse
• select
• separate
• subtype
• task
• terminate
• then
• type
• use
• when
• while
• with
• xor

Pragmas

Has 14 pragmas:

• pragma Controlled
• pragma Elaborate
• pragma Inline
• pragma Interface (obsolescent since Ada 95)
• pragma List
• pragma Memory_Size (obsolescent since Ada 95)
• pragma Optimize
• pragma Pack
• pragma Page
• pragma Priority
• pragma Shared (obsolescent since Ada 95)
• pragma Storage_Unit (obsolescent since Ada 95)
• pragma Suppress
• pragma System_Name (obsolescent since Ada 95)

Attributes

Has 40 attributes:

• Address
• Aft
• Base
• Callable
• Constrained
• Count
• Delta
• Digits
• Emax (obsolescent since Ada 95)
• Epsilon (obsolescent since Ada 95)
• First
• First_Bit
• Fore
• Image
• Large (obsolescent since Ada 95)
• Last
• Last_Bit
• Length
• Machine_Emax
• Machine_Emin
• Machine_Mantissa
• Machine_Overflows
• Machine_Radix
• Machine_Rounds
• Mantissa (obsolescent since Ada 95)
• Pos
• Position
• Pred
• Range
• Safe_Emax (obsolescent since Ada 95)
• Safe_Large (obsolescent since Ada 95)
• Safe_Small (obsolescent since Ada 95)
• Size
• Small
• Storage_Size
• Succ
• Terminated
• Val
• Value
• Width

Library units

Package	Standard
Nested package	Standard.ASCII
Package	Calendar
Package	System
Package	Machine_Code (implementation dependent)
Generic procedure	Unchecked_Deallocation
Generic function	Unchecked_Conversion
Generic package	Sequential_IO
Generic package	Direct_IO
Package	Text_IO
Generic nested package	Text_IO.Integer_IO
Generic nested package	Text_IO.Float_IO
Generic nested package	Text_IO.Fixed_IO
Generic nested package	Text_IO.Enumeration_IO
Package	IO_Exceptions
Package	Low_Level_IO (implementation dependent)

See also

Wikibook

• Ada Programming/Ada 95
• Ada Programming/Ada 2005
• Ada Programming/Ada 2012
• Ada Programming/Keywords
• Ada Programming/Attributes
• Ada Programming/Pragmas

References

• Ada 83 Language Reference Manual
• Rationale for the Design of the Ada Programming Language
• Ada 83 Quality and Style: Guidelines for Professional Programmers

Further reading

• Karl A. Nyberg (Editor), The Annotated Ada Reference Manual, 3rd Edition (March 1994).