manpagez: man pages & more
info r5rs
Home | html | info | man
[ << ] [ < ] [ Up ] [ > ] [ >> ]         [Top] [Contents] [Index] [ ? ]

6 Standard procedures

This chapter describes Scheme’s built-in procedures. The initial (or “top level”) Scheme environment starts out with a number of variables bound to locations containing useful values, most of which are primitive procedures that manipulate data. For example, the variable ‘abs’ is bound to (a location initially containing) a procedure of one argument that computes the absolute value of a number, and the variable ‘+’ is bound to a procedure that computes sums. Built-in procedures that can easily be written in terms of other built-in procedures are identified as “library procedures”.

A program may use a top-level definition to bind any variable. It may subsequently alter any such binding by an assignment (see Assignments). These operations do not modify the behavior of Scheme’s built-in procedures. Altering any top-level binding that has not been introduced by a definition has an unspecified effect on the behavior of the built-in procedures.


[ << ] [ < ] [ Up ] [ > ] [ >> ]         [Top] [Contents] [Index] [ ? ]

This document was generated on October 23, 2011 using texi2html 5.0.