Lowercase Characters (original) (raw)
13 Characters 13.1 Character Concepts
13.1.4 Character Categories
13.1.4.3 Characters With Case
13.1.4.3.2 Lowercase Characters
A lowercase character is one that has a corresponding uppercase character that is different(and can be obtained using char-upcase).
Of the standard characters, only these are lowercase characters:
a b c d e f g h i j k l m n o p q r s t u v w x y z