Editing Scheme (programming language) (section)

===Comments===
{{See also|Comment (computer programming)}}
Up to the R5RS standard, the standard comment in Scheme was a semicolon, which makes the rest of the line invisible to Scheme. Numerous implementations have supported alternative conventions permitting comments to extend for more than a single line, and the R6RS standard permits two of them: an entire [[s-expression]] may be turned into a comment (or "commented out") by preceding it with <code><nowiki>#;</nowiki></code> (introduced in SRFI 62<ref>{{Cite web |last=Taylor Campbell |date=2005-07-21 |title=SRFI 62: S-expression comments |url=http://srfi.schemers.org/srfi-62/srfi-62.html |access-date=2012-08-09 |publisher=The SRFI Editors, schemers.org}}</ref>) and a multiline comment or "block comment" may be produced by surrounding text with <code><nowiki>#</nowiki>|</code> and <code>|#</code>.