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isalpha.0
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1992-08-10
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ISALPHA(3) UNIX Programmer's Manual ISALPHA(3)
NNAAMMEE
iissaallpphhaa - alphabetic character test
SSYYNNOOPPSSIISS
##iinncclluuddee <<ccttyyppee..hh>>
_i_n_t
iissaallpphhaa(_i_n_t _c)
DDEESSCCRRIIPPTTIIOONN
The iissaallpphhaa() function tests for any character for which isupper(3) or
islower(3) is true and for which none of iscntrl(3), isdigit(3),
ispunct(3), or isspace(3) is true. In the _`_`_C_'_' locale, iissaallpphhaa() re
turns true only for the characters for which isupper(3) or islower(3) is
true.
RREETTUURRNN VVAALLUUEESS
The iissaallpphhaa() macro returns zero if the character tests false and returns
nonzero if the character tests true.
SSEEEE AALLSSOO
isascii(3), isalnum(3), iscntrl(3), isdigit(3), isgraph(3),
islower(3), isprint(3), ispunct(3), isspace(3), isupper(3),
isxdigit(3), toascii(3), tolower(3), toupper(3), stdio(3) ascii(7)
SSTTAANNDDAARRDDSS
The iissaallpphhaa() function conforms to ANSI C3.1591989 (``ANSI C'').
BSD Experimental June 29, 1991 1