(string<? string1 string2)
(string>? <string1 string2)
(string<=? string1 string2)
(string>=? string1 string2)
(string-ci<? string1 string2)
(string-ci>? string1 string2)
(string-ci<=? string1 string2)
(string-ci>=? string1 string2)
These procedures are the lexicographic extensions to strings of the
corresponding orderings on characters. For example, string<? is
the lexicographic ordering on strings induced by the ordering
char<? on characters. If two strings differ in length but
are the same up to the length of the shorter string, the shorter string
is considered to be lexicographically less than the longer string.
These procedures use the current language.
8.5.9.7 Substring Extraction
(substring string start end)
Returns a string formed from the characters of
string beginning with index start (inclusive) and ending with index
end (exclusive).
8.5.9.8 String Appendance
(string-append string )
Returns a string formed by the concatenation of the
given strings.
8.5.9.9 Conversion between Strings and Lists
(string->list string)
(list->string chars)
string->list returns a list of the characters that make up the
given string. list->string returns a string formed from the
characters in the list chars. string->list and
list->string are inverses so far as equal? is concerned.