6.3 Logical Operators

Chapter Table of Contents

Section Table of Contents

Chapter Table of Contents Section Table of Contents Practice Logic

Logical operators are binary operators that allow you to combine different boolean expressions (a boolean expression is basically something that can evaluate to either true or false). Look at the tables below to learn about them. The tables are divided into 2 sections: a truth table, and examples. For the truth table section, p refers to any boolean expression.

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For a deeper explanation, you can also watch this Crash Course video (note: don’t worry too much about the logic gates and transistors — focus on what AND, OR, XOR, and NOT mean conceptually).

Credit: Y. Daniel Liang, Introduction to Java Programming (Comprehensive Version), 10th ed.

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NOTE: There is an error in the first example. It should say that the overall expression is false because (age > 28) is false.

Credit: Y. Daniel Liang, Introduction to Java Programming (Comprehensive Version), 10th ed.

There is also a unary logical operator, the logical NOT.

Credit: Y. Daniel Liang, Introduction to Java Programming (Comprehensive Version), 10th ed.

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Logical Operators Example

Practice

Logic

Given the code in the practice template, predict what the output of this program will be. Write your answers as comments on the program next to the print statements.

💻 Template code

✅ Solution code

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2️⃣

6.2 Relational Operators

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4️⃣

6.4 If and Else

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