Annotated Ada Reference Manual (Ada 202y Draft 1) — Legal Information
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2.7 Comments

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A comment starts with two adjacent hyphens and extends up to the end of the line.

Syntax

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comment ::= --{non_end_of_line_character}
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A comment may appear on any line of a program. 

Static Semantics

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The presence or absence of comments has no influence on whether a program is legal or illegal. Furthermore, comments do not influence the meaning of a program; their sole purpose is the enlightenment of the human reader. 

Examples

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Examples of comments:
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{AI12-0440-1} --  the last sentence above echoes the Algol 68 report 

end;  --  processing of Line is complete 

--  a long comment can be split onto
--  two or more consecutive lines   

----------------  the first two hyphens start the comment  
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