boolean expression meaning code example

Example: boolean meaning

while (tries < 4) {
    cout << "Do you want to proceed (y or n)?\n";
    char answer = 0;
    cin >>answer;
    switch (answer) {
    case 'y':
    return true;
    case 'n':
    return false;
    default:
    cout << "Sorry, I don't undersand that.\n";
        ++tries;
        }