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Code fluency,
one blank at a time
Fill-in-the-blank exercises that train your brain to think in code. No videos. No lectures. Just practice.
No account needed
500+
Exercises
7
Languages
∞
Practice
Choose your language
Simple Process
How it works
01
Read the code
Each exercise presents real code with strategically placed blanks to fill.
02
Tap to complete
Select the correct option to fill each blank. No typing, just pattern recognition.
03
Build fluency
Repeat until syntax becomes instinct. Track streaks and watch your accuracy grow.