C++ How to Program, 10/e

5.11 Logical Operators

The if, if…else, while, do…while and for statements each require a condition to determine how to continue a program’s flow of control. So far, we’ve studied only simple conditions, such as count <= 10, number != sentinelValue and total > 1000. Simple conditions are expressed in terms of the relational operators >, <, >= and <= and the equality operators == and !=, and each expression tests only one condition. To test multiple conditions in the process of making a decision, we performed these tests in separate statements or in nested if or if…else statements. Sometimes control statements require more complex conditions to determine a program’s flow of control.

C++’s logical operators enable you to form more complex conditions ...