alpha-char-p character → generalized-boolean

character — a character.

generalized-boolean — a generalized boolean.

Returns true if character is an alphabetic₁ character; otherwise, returns false.

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

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

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

alphanumericp, Section 13.1.10 (Documentation of Implementation-Defined Scripts)