Editing Scheme (programming language) (section)

===Standard procedures===
The following two tables describe the standard procedures in R5RS Scheme. R6RS is far more extensive and a summary of this type would not be practical.

Some procedures appear in more than one row because they cannot easily be classified into a single function in the language.
{| class="wikitable"
|+ Standard procedures in the language R5RS Scheme
! Purpose !! Procedures
|-
| Construction    || {{mono|vector, make-vector, make-string, list}}
|-
| Equivalence predicates || {{mono|1=eq?, eqv?, equal?, string=?, string-ci=?, char=?, char-ci=?}}
|-
| [[Type conversion]] || {{mono|vector->list, list->vector, number->string, string->number, symbol->string, string->symbol, char->integer, integer->char, string->list, list->string}}
|-
| Numbers         || {{mono|''See separate table''}}
|-
| Strings         || {{mono|1=string?, make-string, string, string-length, string-ref, string-set!, string=?, string-ci=?, string<? string-ci<?, string<=? string-ci<=?, string>? string-ci>?, string>=? string-ci>=?, substring, string-append, string->list, list->string, string-copy, string-fill!}}
|-
| Characters      || {{mono|1=char?, char=?, char-ci=?, char<? char-ci<?, char<=? char-ci<=?, char>? char-ci>?, char>=? char-ci>=?, char-alphabetic?, char-numeric?, char-whitespace?, char-upper-case?, char-lower-case?, char->integer, integer->char, char-upcase, char-downcase}}
|-
| Vectors         || {{mono|make-vector, vector, vector?, vector-length, vector-ref, vector-set!, vector->list, list->vector, vector-fill!}}
|-
| Symbols         || {{mono|symbol->string, string->symbol, symbol?}}
|-
| Pairs and lists || {{mono|pair?, cons, car, cdr, set-car!, set-cdr!, null?, list?, list, length, append, reverse, list-tail, list-ref, memq. memv. member, assq, assv, assoc, list->vector, vector->list, list->string, string->list}}
|-
| Identity predicates || {{mono|boolean?, pair?, symbol?, number?, char?, string?, vector?, port?, procedure?}}
|-
| Continuations   || {{mono|call-with-current-continuation (call/cc), values, call-with-values, dynamic-wind}}
|-
| Environments    || {{mono|eval, scheme-report-environment, null-environment, interaction-environment (optional)}}
|-
| Input/output    || {{mono|display, newline, read, write, read-char, write-char, peek-char, char-ready?, eof-object? open-input-file, open-output-file, close-input-port, close-output-port, input-port?, output-port?, current-input-port, current-output-port, call-with-input-file, call-with-output-file, with-input-from-file(optional), with-output-to-file(optional)}}
|-
| System interface || {{mono|load (optional), transcript-on (optional), transcript-off (optional)}}
|-
| Delayed evaluation || {{mono|force}}
|-
| Functional programming || {{mono|procedure?, apply, map, for-each}}
|-
| Booleans        || {{mono|boolean? not}}
|}

String and character procedures that contain "-ci" in their names perform case-independent comparisons between their arguments: upper case and lower case versions of the same character are taken to be equal.

{| class="wikitable"
|+ Standard numeric procedures in the language R5RS Scheme
! Purpose !! Procedures
|-
| Basic arithmetic operators || {{mono|+, -, *, /, abs, quotient, remainder, modulo, gcd, lcm, expt, sqrt}}
|-
| Rational numbers || {{mono|numerator, denominator, rational?, rationalize}}
|-
| Approximation    || {{mono|floor, ceiling, truncate, round}}
|-
| Exactness        || {{mono|inexact->exact, exact->inexact, exact?, inexact?}}
|-
| Inequalities     || {{mono|1=<, <= , >, >=, =}}
|-
| Miscellaneous predicates || {{mono|zero?, negative?, positive? odd? even?}}
|-
| Maximum and minimum || {{mono|max, min}}
|-
| Trigonometry     || {{mono|sin, cos, tan, asin, acos, atan}}
|-
| Exponentials     || {{mono|exp, log}}
|-
| Complex numbers  || {{mono|make-rectangular, make-polar, real-part, imag-part, magnitude, angle, complex?}}
|-
| Input-output     || {{mono|number->string, string->number}}
|-
| Type predicates  || {{mono|integer?, rational?, real?, complex?, number?}}
|}

Implementations of - and / that take more than two arguments are defined but left optional at R5RS.