A boolean variable is declared with the bool keyword and can only take the values true or false:
Example
bool isCodingFun = true;
bool isFishTasty = false;
cout << isCodingFun; // Outputs 1 (true)
cout << isFishTasty; // Outputs 0 (false)
bool isFishTasty = false;
cout << isCodingFun; // Outputs 1 (true)
cout << isFishTasty; // Outputs 0 (false)
From the example above, you can read that a true value returns 1, and false returns 0.
However, it is more common to return boolean values from boolean expressions (see next page).
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