C++ Boolean Expressions
A Boolean expression is a C++ expression that returns a boolean value:
1 (true) or
You can use a comparison operator, such as the greater than (
>) operator to find out if an expression (or a variable) is true:
int y = 9;
cout << (x > y); // returns 1 (true), because 10 is higher than 9
Or even easier:
In the examples below, we use the equal to (
==) operator to evaluate an expression:
cout << (x == 10); // returns 1 (true), because the value of x is equal to 10
Booleans are the basis for all C++ comparisons and conditions.
You will learn more about conditions (if...else) in the next chapter.