ISUPPER(3) BSD Library Functions Manual ISUPPER(3)NAMEisupper — upper-case character test
SYNOPSIS
#include <ctype.h>
int
isupper(int c);;
DESCRIPTION
The isupper() 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''
RETURN VALUES
The isupper() function returns zero if the character tests false and
returns non-zero if the character tests true.
SEE ALSOctype(3), ascii(7)STANDARDS
The isupper function conforms to ANSI X3.159-1989 (“ANSI C89”).
BSD June 4, 1993 BSD