The iswlower() is a built-in function in C/C++ which checks if the given wide character is a lowercase character or not. It is defined within the cwctype header file of C++.
Parameters: The function accepts a single mandatory parameter ch which specifies the wide character which we have to check that if it is a lowercase character or not.
Return Value: The function returns two values as shown below.
- If the parameter ch, is a lowercase character, then a non-zero value is returned.
- If it is not a lowercase character then 0 is returned.
Below programs illustrates the above function.
a is a lowercase character A is not a lowercase character
q is a lowercase character ? is not a lowercase character
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