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digittoint(3), isalnum(3), isalpha(3), isascii(3), isblank(3), iscntrl(3), isdigit(3), isgraph(3), ishexnumber(3), isideogram(3), islower(3), isnumber(3), isphonogram(3), isprint(3), ispunct(3), isrune(3), isspace(3), isspecial(3), isupper(3), isxdigit(3), toascii(3), tolower(3), toupper(3)
character classification functions
digittoint_l(3), isalnum_l(3), isalpha_l(3), isascii_l(3), isblank_l(3), iscntrl_l(3), isdigit_l(3), isgraph_l(3), ishexnumber_l(3), isideogram_l(3), islower_l(3), isnumber_l(3), isphonogram_l(3), isprint_l(3), ispunct_l(3), isrune_l(3), isspace_l(3), isspecial_l(3), isupper_l(3), isxdigit_l(3), tolower_l(3), toupper_l(3)
character classification functions
isdigit(3), isnumber(3)
decimal-digit character test
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