function is the wide-character equivalent of the
.BR isdigit (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 "digit".
.PP
The wide-character class "digit" is a subclass of the wide-character class
The
.BR iswdigit ()
function returns nonzero
-if \fIwc\fP is a wide character
+if
+.I wc
+is a wide character
belonging to the wide-character class "digit".
Otherwise it returns zero.
.SH CONFORMING TO