what are boolean code example

Example 1: what is a Boolean

Boolean refers to a system of logical thought that is used to create true/false
statements. A Boolean value expresses a truth value
(which can be either true or false). Boolean logic was developed by
George Boole, an English mathematician and philosopher, and has become the
basis of modern digital computer logic.

Example 2: 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;
        }