The following functions use C<$_> as a default argument:
abs, alarm, chomp, chop, chr, chroot,
-cos, defined, eval, evalbytes, exp, glob,
-hex, int, lc, lcfirst, length, log, lstat, mkdir, oct, ord, pos, print,
+cos, defined, eval, evalbytes, exp, fc, glob, hex, int, lc,
+lcfirst, length, log, lstat, mkdir, oct, ord, pos, print, printf,
quotemeta, readlink, readpipe, ref, require, reverse (in scalar context only),
-rmdir, sin, split (on its second argument), sqrt, stat, study, uc, ucfirst,
+rmdir, say, sin, split (for its second
+argument), sqrt, stat, study, uc, ucfirst,
unlink, unpack.
=item *
=item *
-The default place to put an input record when a C<< <FH> >>
+The default place to put the next value or input record
+when a C<< <FH> >>, C<readline>, C<readdir> or C<each>
operation's result is tested by itself as the sole criterion of a C<while>
test. Outside a C<while> test, this will not happen.