string c++ if letter is lowercase

#include <iostream>
#include <string>
using namespace std;

int main() {
    string input;
    cout << "Enter a string: ";
    cin >> input;

    for (char &c : input) {
        if (islower(c)) {
            cout << c << " is a lowercase letter." << endl;
        }
    }

    return 0;
}