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ISUPPER(3) BSD Library Functions Manual ISUPPER(3) NAME isupper -- upper-case character test LIBRARY Standard C Library (libc, -lc) SYNOPSIS #include <ctype.h> int isupper(int c); DESCRIPTION The isupper() function tests for any upper-case letter. For single C chars locales (see multibyte(3)) the value of the argument is repre- sentable as an unsigned char or the value of EOF. In the ASCII character set, this includes the following characters (with their numeric values shown in octal): 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'' RETURN VALUES The isupper() function returns zero if the character tests false and re- turns non-zero if the character tests true. SEE ALSO ctype(3), multibyte(3), toupper(3), ascii(7) STANDARDS The isupper() function conforms to ISO/IEC 9899:1990 ("ISO C90"). BSD June 4, 1993 BSD
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | SEE ALSO | STANDARDS
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