Learn Programming

You learn to program by writing programs. Cards help with the part that slows you down: syntax, standard library names, and what a line of code does before you run it.

A Python flashcard with a syntax highlighted code snippet — Predict the output before you flip.

Four ways to study code

Predict the output

Put a short snippet on the front and what it prints on the back. Code blocks are syntax highlighted, so the card reads like your editor.

Flashcards in lessons

Type the names you keep looking up

A typed answer exercise suits a method name, a keyword, or a command line flag. Keep the answer short. It's matched against the text you type.

Type the answer

Turn the docs into cards

Paste a link to a documentation page or a tutorial and Interact drafts cards from it. Edit or delete anything that isn't worth remembering.

Website to flashcards

Do the same with a video

Conference talks and course videos work too. Paste the link and review the main points afterwards instead of rewatching.

YouTube to flashcards

The back of a Python flashcard with the output and a short explanation — The back shows the output and why.

What to put on a card

Good candidates are things you've looked up more than twice: slice syntax, the argument order of a function, the difference between two similar methods, a keyboard shortcut.

Leave out anything you'd only use once. A small set you review is worth more than a large one you don't.

A type-the-answer exercise asking for a Python list method — Typing the name is closer to writing code than recognizing it.

Start with a prompt

The Describe option on the Create page turns a sentence into a set of interactives. This one is a reasonable first set. Change it to match what you're studying.

5 flashcards on Python list and dictionary methods. Put a short code snippet on the front and what it returns on the back.

Start with this prompt

Common questions

Which languages are highlighted?

Common languages are highlighted, including Python, JavaScript, and SQL. Name the language on the code block.

Does it run my code?

No. Cards show code and typed answers are compared as text. Write and run programs in your own editor.

Does it work for interview prep?

Yes, for the parts you can memorize: complexity of common operations, data structure trade-offs, and patterns you want to recognize quickly.

Is it free?

Making cards by hand is unlimited on every plan. The free plan includes 10 AI generations a month.

Stop looking up the same thing

Get Started Free No credit card required

More things to learn

Art History Put the painting on the card and recall the title, artist, and period. Languages Learn vocabulary from pictures instead of translations, in both directions. Math Formulas that render like a textbook, with the worked steps on the back. Anatomy Mask the labels on a diagram and name each structure from memory. Trivia Describe a round in one sentence and play it as a quiz.