4. Iteration (Loops)

In this unit you will learn about loops, which are used to repeat a statement or block of statements.

• 4.1. While Loops
  • 4.1.1. Tracing Loops
  • 4.1.2. Common Errors with Loops
  • 4.1.3. Input-Controlled Loops
  • 4.1.4. Programming Challenge : Guessing Game
  • 4.1.5. Summary
• 4.2. For Loops
  • 4.2.1. Three Parts of a For Loop
  • 4.2.2. Decrementing Loops
  • 4.2.3. Turtle Loops
  • 4.2.4. Programming Challenge : Turtles Drawing Shapes
  • 4.2.5. Summary
• 4.3. Loops and Strings
  • 4.3.1. While Find and Replace Loop
  • 4.3.2. For Loops: Reverse String
  • 4.3.3. Programming Challenge : String Replacement Cats and Dogs
  • 4.3.4. Summary
• 4.4. Nested For Loops
  • 4.4.1. Programming Challenge : Turtle Snowflakes
  • 4.4.2. Summary
• 4.5. Loop Analysis
  • 4.5.1. Tracing Loops
  • 4.5.2. Counting Loop Iterations
  • 4.5.3. Programming Challenge : Analyzing Loops
  • 4.5.4. Summary
• 4.6. Unit 4 Summary
  • 4.6.1. Vocabulary Practice
  • 4.6.2. Concept Summary
  • 4.6.3. Java Keyword Summary
  • 4.6.4. Common Mistakes
• 4.7. Mixed Up Code Practice
• 4.8. Coding Practice with Loops
• 4.9. Multiple Choice Exercises
  • 4.9.1. Easier Multiple Choice Questions
  • 4.9.2. Medium Multiple Choice Questions
  • 4.9.3. More Practice
• 4.10. Lesson Workspace

You have attempted 1 of 1 activities on this page