C Programming/wctype.h/iswdigit

iswdigit is a function in included in the C Standard Library header wctype.h. It checks if a wide character is a decimal digit in the current locale (always includes '0' to '9'). The iswdigit function is a wide charactered version of isdigit function.

Return value
The iswdigit function return non zero value if its argument is a digit between 0 to 9. In other cases, a zero value because of its independent working.