char<=

char<=

type: function (subr) 
location: built-in
source file: xlstr.c
Common LISP compatible: yes
supported on: all machines

SYNTAX

(char<= <char1> <charN> ... )
        <char1>         -       a character expression
        <charN>         -       character expression(s) to compare

DESCRIPTION

The CHAR<= (character-LESS-THAN-OR-EQUAL) function takes one or more character arguments. It checks to see if all the character arguments are monotonically non-decreasing. T is returned if the arguments are of non-decreasing ASCII value. In the case of two arguments, this has the effect of testing if <char1> is less than or equal to <char2>. This test is case sensitive - the character #\a is different (and of greater ASCII value) than #\A.

EXAMPLES

(char<= #\a #\b)                        ; returns T
(char<= #\b #\a)                        ; returns NIL
(char<= #\a #\b #\c)                    ; returns T
(char<= #\a #\a)                        ; returns T 
(char<= #\a #\b #\b)                    ; returns T
(char<= #\A #\a)                        ; returns T
(char<= #\a #\A)                        ; returns NIL