Looking for the best solutions

Welcome to CheckIO – a service that has united all levels of Python developers – from beginners up to the real experts! Here you can learn Python coding, try yourself in solving various kinds of problems and share your ideas with others. Read More...

Interpreters

Choose language in which you want to code

Console

Console enables you to try Python fast and easily.
It is available on any page of CheckIO. You can reach it by clicking on Console icon in the top panel; you will also find it as the bottom panel in Code Editor, or main panel in Inline Learning.
For more information about Console, just open it and type "!h"
Open console...

Inline

Inline learning provides a simple and interesting way to learn the Python basics. Due to these learning courses soon you’ll start making real Python programs and resolve tasks on Checkio.org. More information about how to inline learning...

lists

Learning

Learning Courses enable you to polish your coding skills by resolving base tasks from simple to complex ones, grouped according to their subjects. More information about how to learn...

Texts

15

Clipping

Clip to the interesting tasks and users and be always aware of new events connected with them. Following the user you’ll be able to watch his actions like publications, votes, comments in your timeline. By clipping to the task you will watch any publications, changes, and comments connected with it. More info about clipping...

Timeline (5)

My Timeline

Personal Timeline

Catalog

Catalog of Tasks enables you not only to resolve various tasks and publish your solutions, but also to exchange experience with other members and to increase your skill level. More information about how to play... or get

Hard task:

UCSVLOG Stream Reader

Easy task:

'a' letters count

Score games

Score games provide an exciting opportunity to play single-player games through your own program! Select any game you like in a Score Games catalog and make a Python program that will play the game and score points for you. Create smart programs, win more points and take your place in a Top of players! More information about how to play in score game...

Real Lines
People count

4

Competitions

If you feel easy with Python coding, try yourself in competitions! Here you should write a program that will compete with the other users’ programs in multi-players’ games. Just choose a game you prefer and start coding. Once you’ve made a working program you may pass a qualification with it – your program should play a game against the simplest system program and win. If qualification is passed, your program can be placed on arena – which means it will participate in all competitions provided on arena – play against other programs or users. More information about how to play in competitions...

5 in row

4