iswlower

From cppreference.com
< c‎ | string‎ | wide
Defined in header <wctype.h>
int iswlower( wint_t ch );
(since C95)

Checks if the given wide character is a lowercase letter, i.e. one of abcdefghijklmnopqrstuvwxyz or any lowercase letter specific to the current locale.

Parameters

ch - wide character

Return value

Non-zero value if the wide character is an lowercase letter, zero otherwise.