( Other notations

Info Catalog ( Whitespace and comments ( Lexical conventions
 2.3 Other notations
 For a description of the notations used for numbers, see section 
 . + -
      These are used in numbers, and may also occur anywhere in an
      identifier except as the first character.  A delimited plus or
      minus sign by itself is also an identifier.  A delimited period
      (not occurring within a number or identifier) is used in the
      notation for pairs (section  Pairs and lists), and to
      indicate a rest-parameter in a  formal parameter list (section
       Procedures).  A delimited sequence of three successive
      periods is also an identifier.
 ( )
      Parentheses are used for grouping and to notate lists (section
       Pairs and lists).
      The single quote character is used to indicate literal data
      (section  Literal expressions).
      The backquote character is used to indicate almost-constant data
      (section  Quasiquotation).
 , ,@
      The character comma and the sequence comma at-sign are used in
      conjunction with backquote (section  Quasiquotation).
      The double quote character is used to delimit strings (section
      Backslash is used in the syntax for character constants (section
       Characters) and as an escape character within string
      constants (section  Strings).
 [ ] { } |
      Left and right square brackets and curly braces and vertical bar
      are reserved for possible future extensions to the language.
      Sharp sign is used for a variety of purposes depending on the
      character that immediately follows it:
 #t #f
      These are the boolean constants (section  Booleans).
      This introduces a character constant (section  Characters).
      This introduces a vector constant (section  Vectors).
      Vector constants are terminated by ) .
 #e #i #b #o #d #x
      These are used in the notation for numbers (section  Syntax
      of numerical constants).
Info Catalog ( Whitespace and comments ( Lexical conventions
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