ISUPPER(3) BSD Programmer's Manual ISUPPER(3) NNAAMMEE iissuuppppeerr - upper-case character test SSYYNNOOPPSSIISS ##iinncclluuddee <> _i_n_t iissuuppppeerr(_i_n_t _c); DDEESSCCRRIIPPTTIIOONN The iissuuppppeerr() function tests for any upper-case letter. In the ASCII character set, this includes the following characters: 101 ``A'' 102 ``B'' 103 ``C'' 104 ``D'' 105 ``E'' 106 ``F'' 107 ``G'' 110 ``H'' 111 ``I'' 112 ``J'' 113 ``K'' 114 ``L'' 115 ``M'' 116 ``N'' 117 ``O'' 120 ``P'' 121 ``Q'' 122 ``R'' 123 ``S'' 124 ``T'' 125 ``U'' 126 ``V'' 127 ``W'' 130 ``X'' 131 ``Y'' 132 ``Z'' RREETTUURRNN VVAALLUUEESS The iissuuppppeerr() function returns zero if the character tests false and re- turns non-zero if the character tests true. SSEEEE AALLSSOO ctype(3), ascii(7) SSTTAANNDDAARRDDSS The isupper function conforms to ANSI C X3.159-1989 (``ANSI C ''). 4.4BSD June 4, 1993 1