Which programming class should I take?

UW offers many excellent introductory programming classes. These options include CSE 142, CSE 143, CSE 143X, CSE 160, and AMath 301. Different classes are best for different people — no one class is better than the others. This webpage will help you decide among them.

1. Do you already know how to program?
   If you are confident in your ability to write small programs, you would be bored or would waste your time in CSE 160. CSE 160 is intended for beginners.
   • If you know how to program in Java: CSE 143
   • If you know how to program, but not in Java: CSE 143X
   • If you know how to program, but want to learn Python: See The Python Tutorial (for Python 2 or Python 3), Learn Python The Hard Way (which should really be titled, "Learn Python by programming in it"), and the other recommended readings and self-study resources.
2. What programming language do you want to learn?
   • If you want to learn Java, which is the #1 programming language in the world and is used throughout the CSE curriculum: CSE 142
   • If you want to learn Python, which is a fun, easy-to-use language that is just as powerful as Java: CSE 160
   • If you want to learn MATLAB for solving problems from engineering and science that can be expressed as differential equations : AMath 301
   If you don't care, proceed to the next question.
3. What style of problem motivates you?
   • If you are more motivated by puzzles and games: CSE 142
   • If you are more motivated by problems drawn from engineering, the physical sciences, and the social sciences: CSE 160
   • If you are more motivated by solving problems from engineering and science that can be expressed as differential equations: AMath 301
   If you don't care, proceed to the next question.
4. What are your schedule constraints?
   • CSE 142 is taught every quarter at multiple times, so it offers more scheduling flexibility.
   • CSE 160 is taught less frequently.

Frequently Asked Questions about CSE 160

• I have already taken CSE 143? Can I take CSE 160? - You will not receive credit for CSE 160 if you have already taken CSE 143. CSE 160 is intended for beginners.
• I have already taken CSE 142? Can I take CSE 160? - We do allow this, and you can receive credit for taking CSE 160 if you have already taken CSE 142. However, note that CSE 160 is intended for beginners. The conceptual material in CSE 160 is similar (but not identical) to CSE 142. CSE 160 uses a different programming language, and the presentation of topics and the application domain are different. Because of the overlap in topics, a student who excelled in CSE 142 may be bored taking CSE 160, so a different class that teaches new material could be a better use of time.
• Is CSE 160 meant to be a "gentler" introduction to programming than CSE 142? - Both CSE 142 and CSE 160 are intended to be introductions to programming, and both are aimed at students who have not programmed before. Both classes require hard work to succeed, but any student can succeed in either class! Neither class is intended to be easier or "gentler" than the other. You should pick the course that best fits your goals - and plan to work hard in either class to achieve those goals.
• I am planning on applying to the CSE major, will taking CSE 160 help me be accepted to the major? - First, note that you will not receive credit for CSE 160 if you have already taken CSE 143. CSE 142 and CSE 143 are the standard prerequisites for CSE admission, and must be taken before applying to the major. The admission committee relies on strong grades in these classes to show preparation for the major. While a very high or low grade in CSE 160 may have some impact on your chance of admission, it is not a standard course considered by the admissions committee.
• Can I take CSE 142 or CSE 143 AFTER taking CSE 160? - Most definitely YES! CSE 160 is designed to give you enough skills so that afterwards you can use Python to address your own data analysis questions. However if you enjoy the class and want to take more CSE courses or decide to apply to the CSE major you CAN receive credit for CSE 142 and CSE 143 if they are taken after CSE 160. Please see the discussion of What class to take after CSE 160 below.

Substituting CSE 160 for other classes

Some departments/classes have AMath 301 or CSE 142 as requirements/electives/prerequisites. Many departments and instructors are accommodating about permitting an exception to these requirements if you have taken CSE 160, but of course you will have to explicitly request such permission. If the prerequisite exists because of specific skills, such as a need for knowledge of Java, MATLAB, or differential equations, then CSE 160 cannot substitute. If the prerequisite exists because students should have a general knowledge of computational thinking and programming, then the substitution makes sense. Note that some departments may not yet be aware of the new course number for CSE 160 Data Programming, which was previously numbered CSE 140. CSE 160 is the same as the old CSE 140, only the course number changed.

What programming class should I take after CSE 160?

What programming class should you take after CSE 160? You don't have to take any more programming classes. After CSE 160, you will have the ability to write small programs to solve real-world data analysis and transformation problems. You will also know enough to use resources such as books and websites to learn more. But, you may find that you enjoy programming so much that you want to progress to the next level. Or, you may want to solve larger and more challenging problems. Here are some options:

• CSE 142 is an introduction to programming concepts and the Java language, assuming no programming background. The conceptual material is similar (but not identical) to CSE 160, though the presentation and the application domain is different. Because of the overlap in topics, a student who excelled in one of the two classes may be bored taking the second one, so a different class that teaches new material could be a better use of time. But some graduates of CSE 160 may benefit from the fact that CSE 142 will review some concepts from CSE 160, teaches a different programming language, and has a different pedagogical style.
• CSE 143 assumes knowledge of CSE 142 (in particular, familiarity with Java), but it has no official prerequisites — any student can take it without having taken CSE 142. CSE 143 is a possibility for a student who did well in CSE 160 and is willing to spend extra effort to come up to speed on Java.
• CSE 143X covers the material of CSE 142 and CSE 143 in a single quarter. Students are assumed to be familiar with programming concepts, though not necessarily with Java. It is currently offered in the autumn quarter.
• HCDE 310 assumes CSE 160 (previously numbered CSE 140) or CSE 142 as a prerequisite. It shows you how to use Python to process web data and create Internet mashups. You address more ambitious design problems than in CSE 160, and create prototypes of useful services. The class is officially open only to HCDE majors, but if you have taken CSE 160, you can petition to get in.
• UW Professional and Continuing Education offers a Certificate in Python Programming, consisting of three classes (you can take as many or as few as you like): Programming in Python, Internet Programming in Python, and System Development with Python.

Self-study

The best way to learn to program is to do it! When you encounter a task that could be done via programming, do it that way even if that takes you a little while longer. You will get better the more practice you get. Try to get feedback on your programming — either from thoughtful introspection or from a more expert programmer — since that is the best way to improve.

Books are useful, but only if you then put the ideas into practice. That said, you should return to the resources listed on the syllabus, reading the parts that weren't assigned (or that you didn't read) during the quarter. Some other books you might find useful are Learn Python The Hard Way (which should really be titled, "Learn Python by programming in it"), and Practical Programming: An Introduction to Computer Science Using Python (for Python 2 or Python 3).

In addition to the UW Professional and Continuing Education courses listed above, there are online courses available from a variety of sources. Below are listed a few related to either Python or data programming that may be of interest. Some of these have fees but many of them have their videos and assignments available for free if you are not interested in receiving a certification. Usually you still have to sign up (even when it is free) in order to view the videos etc. Sometimes you can't tell if there is a free option until you try to sign up. So try it!

• Coursera (e.g. UW Intro to Data Science, UW 5-course sequence in Machine Learning, DNA Sequencing Algorithms, Genomics, Signal Processing for Music, U Michigan 5-course sequence)
• edX (e.g. Intro to Python, Big Data, Intro to Python, Intro to CS from authors of our textbook Course 1, Course 2, Artificial Intelligence)
• Software Carpentry