Computer Science A
  • Introduction
  • Overview
  • Course at a Glance
  • Course Exam and Description
  • Quick Reference Sheet
  • Unit 1 Primitive Types
    • 1.1 Why Programming? Why Java?
    • 1.2 Variables and Data Types
    • 1.3 Expressions and Assignment Statements
    • 1.4 Compound Assignment Operators
    • 1.5 Casting and Ranges of Variables
  • Unit 2 Using Objects
    • 2.1 Objects: Instances of Classes
    • 2.2 Creating and Storing Objects (Instantiation)
    • 2.3 Calling a Void Method
    • 2.4 Calling a Void Method with Parameters
    • 2.5 Calling a Non-void Method
    • 2.6 String Objects: Concatenation, Literals, and More
    • 2.7 String Methods
    • 2.8 Wrapper Classes: Integer and Double
    • 2.9 Using the Math Class
  • Unit 3 Boolean Expressions and if Statements
    • 3.1 Boolean Expressions
    • 3.2 if Statements and Control Flow
    • 3.3 if-else Statements
    • 3.4 else if Statements
    • 3.5 Compound Boolean Expressions
    • 3.6 Equivalent Boolean Expressions
    • 3.7 Comparing Objects
  • Unit 4 Iteration
    • 4.1 while Loops
    • 4.2 for loops
    • 4.3 Developing Algorithms Using Strings
    • 4.4 Nested Iteration
    • 4.5 Informal Code Analysis
  • Unit 5 Writing Classes
    • 5.1 Anatomy of a Class
    • 5.2 Constructors
    • 5.3 Documentation and Comments
    • 5.4 Accessor Methods
    • 5.5 Mutator Methods
    • 5.6 Writing Methods
    • 5.7 Static Variables and Methods
    • 5.8 Scope and Access
    • 5.9 this Keyword
    • 5.10 Ethical and Social Implications of Computing Systems
  • Unit 6 Array
    • 6.1 Array Creation and Access
    • 6.2 Traversing Arrays
    • 6.3 Enhanced for Loop for Arrays
    • 6.4 Developing Algorithms Using Array
  • Unit 7 ArrayList
    • 7.1 Introduction to ArrayList
    • 7.2 ArrayList Methods
    • 7.3 Traversing ArrayLists
    • 7.4 Developing Algorithms Using ArrayLists
    • 7.5 Searching
    • 7.6 Sorting
    • 7.7 Ethical Issues Around Data Collection
  • Unit 8 2D Array
    • 8.1 2D Arrays
    • 8.2 Traversing 2D Arrays
  • Unit 9 Inheritance
    • 9.1 Creating Superclasses and Subclasses
    • 9.2 Writing Constructors for Subclasses
    • 9.3 Overriding Methods
    • 9.4 super Keyword
    • 9.5 Creating References Using Inheritance Hierarchies
    • 9.6 Polymorphism
    • 9.7 Object Superclass
  • Unit 10 Recursion
    • 10.1 Recursion
    • 10.2 Recursive Searching and Sorting
  • Free Response Questions
    • 2021
    • 2022
    • 2023
    • 2024
  • Code
    • Week 1
    • Week 2
    • Week 3
    • Week 4
    • Week 5
    • Week 6
    • Week 7
    • Week 8
    • Week 9
    • Week 10
    • Week 11
    • Week 12
    • Week 13
    • Week 14
    • Week 15
    • Week 16
    • Week 17
    • Week 18
    • Week 19
    • Week 20
    • Week 21
    • Week 22
    • Week 23
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  • Enduring Understanding
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  1. Unit 3 Boolean Expressions and if Statements

3.5 Compound Boolean Expressions

Enduring Understanding

Programmers incorporate iteration and selection into code as a way of providing instructions for the computer to process each of the many possible input values.

Learning Objective

Represent branching logical processes by using nested conditional statements.

Essential Knowledge

Nested if statements consist of if statements within if statements.

Enduring Understanding

The way variables and operators are sequenced and combined in an expression determines the computed result.

Learning Objective

Evaluate compound Boolean expressions in program code.

Essential Knowledge

Logical operators !(not), &&(and), and ||(or) are used with Boolean values. This represents the order these operators will be evaluated.

An expression involving logical operators evaluates to a Boolean value.

When the result of a logical expression using && or || can be determined by evaluating only the first Boolean operand, the second is not evaluated. This is known as short-circuited evaluation.

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