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char-not-equal

Type: - function (subr)

Source: - xlstr.c

Syntax

(char-not-equal char1 charN ... ): char1 - a character expression
charN - character expression(s) to compare
returns - T if the characters are of different ASCII value, NIL otherwise
Note: case is not significant with this function

Description

The 'char-not-equal' function tests if all the character arguments are different values. T is returned if the arguments are of different ASCII value, NIL otherwise. In the case of two arguments, this has the effect of testing if 'char1' is not equal to 'char2'. This test is case insensitive, the character '#\a' is considered to be the same ASCII value as the character '#\A'.

Examples

(char-not-equal #\a #\b)      => T
(char-not-equal #\a #\b #\c)  => T
(char-not-equal #\a #\a)      => NIL
(char-not-equal #\a #\b #\b)  => NIL
(char-not-equal #\A #\a)      => NIL
(char-not-equal #\a #\A)      => NIL