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characterp Characters Dictionary alphanumericp
Function

alpha-char-p

alpha-char-p character ⇒ generalized-boolean

Arguments and Values

charactera character.
generalized-booleana generalized boolean.

Description

Returns true if character is an alphabetic_1 character; otherwise, returns false.

Examples

 (alpha-char-p #\a) ⇒  true
 (alpha-char-p #\5) ⇒  false
 (alpha-char-p #\Newline) ⇒  false
 ;; This next example presupposes an implementation
 ;; in which #\\alpha is a defined character.
 (alpha-char-p #\\alpha) ⇒  implementation-dependent

Affected By

None. (In particular, the results of this predicate are independent of any special syntax which might have been enabled in the current readtable.)

Exceptional Situations

Should signal an error of type type-error if character is not a character.

See Also

alphanumericp, Documentation of Implementation-Defined Scripts

Backlinks

alphanumericp, char-upcase, char-downcase, Characters Dictionary, Documentation of Implementation-Defined Scripts, Introduction to Characters, Symbols in the COMMON-LISP Package