APL Challenge
Solve short APL problems in the browser for a chance at a prize
The APL Challenge is a set of short problems that you solve by typing APL expressions into an answer box on each problem page. The site teaches the APL you need as you go, and you enter symbols from an on-screen language bar. Only correct answers are accepted, and some language features are blocked so that you use the technique being taught.
Free · No login · Browser · Beginner
About APL Challenge
It introduces array programming and a very different way of thinking about problems. It is aimed at newcomers to APL, even people who have never programmed.
It runs in the browser with no installation. Rounds run quarterly, and entering an email address puts you in the draw for three USD 100 prizes per round. It is free.
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