to check variable if its non numeric Post: 302149598

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check if a string is numeric

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Check whether input is numeric

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towlower

TOWLOWER(3)						     Linux Programmer's Manual						       TOWLOWER(3)

NAME

       towlower - convert a wide character to lowercase

SYNOPSIS

       #include <wctype.h>

       wint_t towlower(wint_t wc);

DESCRIPTION

       The  towlower() function is the wide-character equivalent of the tolower(3) function.  If wc is a wide character, it is converted to lower-
       case.  Characters which do not have case are returned unchanged.  If wc is WEOF, WEOF is returned.

RETURN VALUE

       The towlower() function returns the lowercase equivalent of wc, or WEOF if wc is WEOF.

CONFORMING TO

       C99.

NOTES

       The behavior of towlower() depends on the LC_CTYPE category of the current locale.

       This function is not very appropriate for dealing with Unicode characters, because Unicode knows about three cases: upper, lower and  title
       case.

SEE ALSO

       iswlower(3), towctrans(3), towupper(3)

COLOPHON

       This  page is part of release 3.53 of the Linux man-pages project.  A description of the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.

GNU
								    1999-07-25							       TOWLOWER(3)