islower() in C++

islower(): This function is available in the file ctype.h. This function checks whether the given character is a lowercase letter or not. If the character is a lowercase letter then it returns true otherwise, it returns false (0). It returns a value different from zero (i.e. true) if indeed c is a lowercase alphabetic letter. Zero (i.e. false) otherwise.

Parameters: One parameter is required for this function.

arg: The character to be checked.

Syntax:

islower(arg)

For Example:

islower('a') = > It return true.

islower('A') = > It return false(0).

Approach

C++

#include <bits/stdc++.h>
using namespace std;

int main()
{
    char ch = 'a';

    cout << islower(ch) << "\n";

    return 0;
}