Syntax of iswlower() function
int iswlower(wint_t ch)
Here, wint_t is a wide integer type used to represent a wide character.
iswlower() Function in C
The iswlower() is a built-in function in C that checks whether the given wide character is a lowercase character or not.
iswlower() function is defined inside the <wctype.h> in C.