## Boolean Expressions

This chapter introduces relational and logical operators. It also discusses the use of these operators to write Boolean expressions.

### 1. Boolean Expressions

The `if`

statements of the previous chapters asked simple true/false questions (boolean expressions) such as `count<10`

. Often simple boolean expressions are not enough. This chapter discusses more complicated
boolean expressions.

Boolean expressions have been prominent on past AP Computer Science tests.

**Chapter Topics:**

- Relational Operators (review)
- Logical Operators
- AND Operator
- How to check that a number is in range
- Boolean Expressions
- OR Operator
- Comparison between AND and OR
- NOT Operator

**Question 1:**

You have decided to bake some cookies (much cheaper than buying them at the Mall).

An interesting cookie recipe calls for 4 cups of flour and 2 cups of sugar. You look in your pantry and

find 3 cups of flour and 2 cups of sugar.

Can you bake cookies with what you have?

Source: Bradley Kjell, http://programmedlessons.org/Java9/chap18/ch18_01.html

This work is licensed under a Creative Commons Attribution-NonCommercial 3.0 License.