## 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?