AP CSA Unit 2: Selection and Iteration

AP CSA · Unit 2 · 12 Lessons

Unit 2: Selection and Iteration

Master conditional statements and loops. Understand the control structures that form the foundation of every algorithm you’ll write in AP CSA and beyond.

12 Lessons
~30% AP Exam Weight
96+ Practice Questions

All 12 Lessons

Lesson 2.1
Algorithms with Selection and Repetition
Conceptual
Lesson 2.2
Boolean Expressions
Code Mechanics
Lesson 2.3
if Statements
Code Mechanics
Lesson 2.4
Nested if Statements
Code Mechanics
Lesson 2.5
Compound Boolean Expressions
Code Mechanics
Lesson 2.6
Comparing Boolean Expressions
Code Mechanics
Lesson 2.7
while Loops
Code Mechanics
Lesson 2.8
for Loops
Code Mechanics
Lesson 2.9
Implementing Selection and Iteration Algorithms
Code Mechanics
Lesson 2.10
Implementing String Algorithms
Code Mechanics
Lesson 2.11
Nested Iteration
Code Mechanics
Lesson 2.12
Informal Run-Time Analysis
Conceptual
What you’ll learn in Unit 2
  • Write boolean expressions using relational and logical operators
  • Use if, if-else, and if-else-if statements to control program flow
  • Build while and for loops to repeat code efficiently
  • Implement selection and iteration algorithms (accumulator, counter, sentinel)
  • Trace and debug complex control flow including nested structures
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Also in this course
Unit 1 Using Objects and Methods 15 lessons · ~20% of exam Unit 2 Selection and Iteration 12 lessons · ~30% of exam You are here Unit 3 Class Creation 9 lessons · ~14% of exam Unit 4 Data Collections 17 lessons · ~35% of exam

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