@node isdigit
@section @code{isdigit}
@findex isdigit

POSIX specification: @url{http://www.opengroup.org/susv3xsh/isdigit.html}

Gnulib module: ---

Portability problems fixed by Gnulib:
@itemize
@end itemize

Portability problems not fixed by Gnulib:
@itemize
@end itemize