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 14.3.1.1 Evaluating Literal Data
 ................................
 
 When a literal data expression is evaluated, the value of the expression
 is simply the value that the expression describes.  The evaluation of a
 literal data expression has no side effects.
 
 So, for example,
 
    * the value of the expression `"abc"' is the string value `"abc"'
 
    * the value of the expression `3+4i' is the complex number 3 + 4i
 
    * the value of the expression `#(1 2 3)' is a three-element vector
      containing the numeric values 1, 2 and 3.
 
    For any data type which can be expressed literally like this, the
 syntax of the literal data expression for that data type -- in other
 words, what you need to write in your code to indicate a literal value
 of that type -- is known as the data type's "read syntax".  This manual
 specifies the read syntax for each such data type in the section that
 describes that data type.
 
    Some data types do not have a read syntax.  Procedures, for example,
 cannot be expressed as literal data; they must be created using a
 `lambda' expression ( Creating a Procedure) or implicitly using
 the shorthand form of `define' ( Lambda Alternatives).
 

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