function is the wide-character equivalent of the
.BR isupper (3)
function.
-It tests whether \fIwc\fP is a wide character
+It tests whether
+.I wc
+is a wide character
belonging to the wide-character class "upper".
.PP
The wide-character class "upper" is a subclass of the wide-character class
Being a subclass of the wide-character class "alpha", the wide-character class
"upper" is disjoint from the wide-character class "digit".
.PP
-The wide-character class "upper" contains at least those characters \fIwc\fP
-which are equal to \fItowupper(wc)\fP and different from \fItowlower(wc)\fP.
+The wide-character class "upper" contains at least those characters
+.I wc
+which are equal to
+.I towupper(wc)
+and different from
+.IR towlower(wc) .
.PP
The wide-character class "upper" always contains at least the
letters \(aqA\(aq to \(aqZ\(aq.
.SH RETURN VALUE
The
.BR iswupper ()
-function returns nonzero if \fIwc\fP is a wide character
+function returns nonzero if
+.I wc
+is a wide character
belonging to the wide-character class "upper".
-Otherwise it returns zero.
+Otherwise, it returns zero.
.SH CONFORMING TO
C99.
.SH NOTES
.BR isupper (3),
.BR iswctype (3),
.BR towupper (3)
+.SH COLOPHON
+This page is part of release 3.79 of the Linux
+.I man-pages
+project.
+A description of the project,
+information about reporting bugs,
+and the latest version of this page,
+can be found at
+\%http://www.kernel.org/doc/man\-pages/.