25wi ver.
Note: this is for the Winter 2025 iteration of CSE 121. Looking for a different quarter? Please visit https://courses.cs.washington.edu/courses/cse121/.
Welcome to CSE 121: Introduction to Computer Programming I 🎉
What is this class? What will I learn?
Computing continues to play an ever-increasing role in today’s society. Having an understanding of computing is an essential skill for those in the 21st century; from working in industries more reliant on technology, using computational methods to further scientific understanding, or being an informed citizen in a world with technology all around us.
This course is a first course in computer programming focused on the basics of procedural programming in Java. It assumes students have not taken a previous programming course and do not have substantial other programming experience.
Students with previous experience are encouraged to consider CSE 122 or see the Allen School’s page on introductory courses.
This Week (at a glance)¶
Monday (03/10)
- Nothing!
Tuesday (03/11)
- Section 17: TA's Choice!
Wednesday (03/12)
- Lesson 18: Final Exam Review
A lecture @ 12:30 in KNE 120; B lecture at 2:30 in GUG 220
Thursday (03/13)
- Section 18: Final Exam Review; Wrap-Up
Friday (03/14)
- Lesson 19: Final Exam Review; Victory Lap!
A lecture @ 12:30 in KNE 120; B lecture at 2:30 in GUG 220
Calendar¶
Pre-Class
Anything listed in the “pre-class” materials (PCMs) for a day should be read before attending class that day. The PCMs are a first introduction to the most important terms and concepts for that day of class. It is okay if the PCMs don’t make complete sense as we have the rest of the class day to clarify the concepts, but if you don’t do the PCMs, the class session won’t make any sense.
| Topic | Programming / Creative Projects | Resubmissions | ||
|---|---|---|---|---|
| Week 1 | ||||
| Wed 01/08 | LES 00 Course Policies; Hello World! Note: Normally you would complete the Pre-class Work before class. There is nothing you need to complete before class today! | |||
| Thu 01/09 | SEC 00 Welcome; More Hello World! resources: materials | |||
| Fri 01/10 | LES 01 Printing; Strings; Variables | |||
| Released C0 I.S. by 11:59pm PT Hello Bugs | ||||
| Week 2 | ||||
| Tue 01/14 | SEC 01 Printing; Strings; Variables resources: materials extra resources Extra resources | |||
| Wed 01/15 | LES 02 Datatypes; Expressions | |||
| Released P0 I.S. by 11:59pm PT Cornbear's Cafe | ||||
| Thu 01/16 | SEC 02 Datatypes; Expressions resources: materials extra resources Extra resources | |||
| Fri 01/17 | LES 03 String Methods; char; More Variables | |||
| Week 3 | ||||
| Tue 01/21 | SEC 03 String Methods; char; More Variables resources: materials extra resources Extra resources | |||
| Wed 01/22 | LES 04 for Loops | |||
| Released C1 I.S. by 11:59pm PT ASCII Art | ||||
| Thu 01/23 | SEC 04 for Loops resources: materials extra resources Extra resources | |||
| Released R0 C0, P0 Due 11:59pm PT Resub 0 | ||||
| Fri 01/24 | LES 05 Nested for Loops; Random; Math | |||
| Week 4 | ||||
| Tue 01/28 | SEC 05 Nested for Loops; Random; Math resources: materials extra resources Extra resources | |||
| Wed 01/29 | LES 06 Methods; Parameters; Scope | |||
| Released P1 I.S. by 11:59pm PT Election Simulator | ||||
| Thu 01/30 | SEC 06 Methods; Parameters; Scope resources: materials extra resources Extra resources | |||
| Released R1 C0, P0, C1 Due 11:59pm PT Resub 1 | ||||
| Fri 01/31 | LES 07 Methods; Parameters; Return Values | |||
| Week 5 | ||||
| Tue 02/04 | SEC 07 Returns resources: materials extra resources Extra resources | |||
| Wed 02/05 | LES 08 More Methods Practice Note: No Pre-Class Material for Today! | |||
| Released C2 I.S. by 11:59pm PT Social Network | ||||
| Thu 02/06 | SEC 08 CANCELLED (old Quiz 0) Note: This was our old Quiz 0 date. Please see Matt's Ed announcement for more details. resources: extra resources Extra resources | |||
| Released R2 C0, P0, C1, P1 Due 11:59pm PT Resub 2 | ||||
| Fri 02/07 | LES 09 Conditionals | |||
| Week 6 | ||||
| Tue 02/11 | SEC 09 Conditionals resources: materials extra resources Extra resources | |||
| Wed 02/12 | LES 10 while Loops Note: Today's lecture is shorter because of our mid-quarter feedback session! | |||
| Thu 02/13 | QUIZ 00 RESCHEDULED: Quiz 0: Printing, Datatypes, Expressions, for Loops, Methods, Parameters, Scope resources: extra resources Extra resources | |||
| Released R3 P0, C1, P1, C2 Due 11:59pm PT Resub 3 | ||||
| Fri 02/14 | LES 11 User Input ( Scanner) pre-class: materials in-class: materials resources: recordings extra resources Recordings Extra resources | |||
| Released P2 I.S. by 11:59pm PT Prioritizing Patients | ||||
| Week 7 | ||||
| Tue 02/18 | SEC 11 while Loops, Scanner (User Input) resources: materials extra resources Extra resources | |||
| Wed 02/19 | LES 12 Putting It All Together Note: No Pre-Class Material for Today! | |||
| Thu 02/20 | QUIZ 01 Quiz 1: for loops, Random, Math, Methods, Parameters, Returns, Conditionals, while Loops resources: extra resources Extra resources | |||
| Released R4 C1, P1, C2 Due 11:59pm PT Resub 4 | ||||
| Fri 02/21 | LES 13 Arrays | |||
| Week 8 | ||||
| Tue 02/25 | SEC 13 Arrays resources: materials extra resources Extra resources | |||
| Wed 02/26 | LES 14 Reference Semantics | |||
| Released C3 I.S. by 11:59pm PT Dance Dance Arrayvolution | ||||
| Thu 02/27 | SEC 14 Reference Semantics resources: materials extra resources Extra resources | |||
| Released R5 P1, C2, P2 Due 11:59pm PT Resub 5 | ||||
| Fri 02/28 | LES 15 2D Arrays | |||
| Week 9 | ||||
| Tue 03/04 | SEC 15 2D Arrays resources: materials extra resources Extra resources | |||
| Wed 03/05 | LES 16 Array Patterns (Guest Lecture!) | |||
| Released P3 I.S. by 11:59pm PT 2DNArray Sequencing | ||||
| Thu 03/06 | QUIZ 02 Quiz 2: Conditionals, while Loops, User Input (Scanner), Arrays, Reference Semantics resources: extra resources Extra resources | |||
| Released R6 C2, P2, C3 Due 11:59pm PT Resub 6 | ||||
| Fri 03/07 | LES 17 Wrapping Up Arrays! Note: No Pre-Class Material for Today! | |||
| Week 10 | ||||
| Tue 03/11 | SEC 17 TA's Choice! | |||
| Wed 03/12 | LES 18 Final Exam Review Note: No Pre-Class Material for Today! in-class: pdf pptx Programming Problem resources: recordings extra resources Recordings Extra resources | |||
| Thu 03/13 | SEC 18 Final Exam Review; Wrap-Up resources: materials extra resources Extra resources | |||
| Released R7 C0-P3 (ALL!) Due 11:59pm PT Resub 7 | ||||
| Fri 03/14 | LES 19 Final Exam Review; Victory Lap! Note: No Pre-Class Material for Today! in-class: materials pdf pptx Review Problem resources: recordings extra resources Recordings Extra resources | |||
| Week 11 | ||||
| Tue 03/18 | | |||
| Wed 03/19 | Finals Week | |||
| Thu 03/20 | Finals Week | |||
| Fri 03/21 | Finals Week | |||