Java, A Beginner's Guide, 5th Edition, 5th Edition

The Boolean Type

The boolean type represents true/false values. Java defines the values true and false using the reserved words true and false. Thus, a variable or expression of type boolean will be one of these two values.

Here is a program that demonstrates the boolean type:

The output generated by this program is shown here:

There are three interesting things to notice about this program. First, as you can see, when a boolean value is output by println( ), “true” or “false” is displayed. Second, the value of a boolean variable is sufficient, ...