1.\" Copyright (c) 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" This code is derived from software contributed to Berkeley by 5.\" the American National Standards Committee X3, on Information 6.\" Processing Systems. 7.\" 8.\" %sccs.include.redist.man% 9.\" 10.\" @(#)isupper.3 8.1 (Berkeley) 06/04/93 11.\" 12.Dd 13.Dt ISUPPER 3 14.Os 15.Sh NAME 16.Nm isupper 17.Nd upper-case character test 18.Sh SYNOPSIS 19.Fd #include <ctype.h> 20.Ft int 21.Fn isupper "int c"; 22.Sh DESCRIPTION 23The 24.Fn isupper 25function tests for any upper-case letter. 26In the ASCII character set, this includes the following characters: 27.sp 28.Bl -column \&000_``0''__ \&000_``0''__ \&000_``0''__ \&000_``0''__ \&000_``0''__ 29.It \&101\ ``A'' \t102\ ``B'' \t103\ ``C'' \t104\ ``D'' \t105\ ``E'' 30.It \&106\ ``F'' \t107\ ``G'' \t110\ ``H'' \t111\ ``I'' \t112\ ``J'' 31.It \&113\ ``K'' \t114\ ``L'' \t115\ ``M'' \t116\ ``N'' \t117\ ``O'' 32.It \&120\ ``P'' \t121\ ``Q'' \t122\ ``R'' \t123\ ``S'' \t124\ ``T'' 33.It \&125\ ``U'' \t126\ ``V'' \t127\ ``W'' \t130\ ``X'' \t131\ ``Y'' 34.It \&132\ ``Z'' 35.El 36.Sh RETURN VALUES 37The 38.Fn isupper 39function returns zero if the character tests false and 40returns non-zero if the character tests true. 41.Sh SEE ALSO 42.Xr ctype 3 , 43.Xr ascii 7 44.Sh STANDARDS 45The 46.Xr isupper 47function conforms to 48.St -ansiC . 49