Outline:

0. Questions?
1. Recap Lesson 10
   • break and continue keywords
   • Exercise 1
2. Logical operators
   • and, or, not
   • truth tables
   • Exercises 2+3
3. Working with strings
   • basic operations
   • index function
   • Exercise 6: indexing and slicing
4. Recap so far – prep for Quiz #1

Explore after class:

5. More practice with truth tables: Exercises 4+5
6. More reading (optional but super helpful):
   • more string functions: Zelle section 8.5 (pp. 251–255)
   • string formatting: Zelle section 8.6 (pp. 255–260)
7. Read about chr/ord in Ch. 8, then try Exercise 7

Want more practice?

8. Codingbat:
   • using Booleans:
     • if-else
     • more examples with booleans
   • practice with lists/strings:
     • lists
     • mixing if with strings/lists: count_hi, cat_dog, common_end, array_count9, string_match

What’s next

Upcoming events/assessments:

• CS Bits and Bytes tomorrow at 3:30pm in Anderson 329: Alex Dixon ‘01 (at Adobe) on HDR photo editing
• Homework assignment 4 is due tomorrow
• Quiz #2 will be on Friday (in Olin 149)

What you should do now:

• The readings (see below)
• Finish Assignment 4

Reading assignment (to be completed by the next class):

• Zelle sections 8.1–8.4 (pp. 235–250)
• Zelle section 8.7 (pp. 261)