4.12. Boolean Values¶

The types we have seen so far are pretty big. There are a lot of integers in the world, and even more floating-point numbers. By comparison, the set of characters is pretty small. Well, there is another type in C++ that is even smaller. It is called boolean, and the only values in it are true and false.

Without thinking about it, we have been using boolean values for the last couple of chapters. The condition inside an if statement or a while statement is a boolean expression. Also, the result of a comparison operator is a boolean value. For example:

if (x == 5) {
  // do something
}

The operator == compares two integers and produces a boolean value.

The values true and false are keywords in C++, and can be used anywhere a boolean expression is called for. For example,

bool is_prime = false;

Q-1: The boolean type has two values and . The operator is used to check if two boolean values are equal.

Put the following blocks in order of how large the type is. Put the largest type at the top.

        double
int
char
bool

More to Explore

From cppreference.com
- C++ bool_literal