You’ve finished your free lessons! 🎉
Create a free account to unlock every lesson, save your progress, keep your streak and get personal review suggestions. It takes 20 seconds.
Loop over a map’s keys, its values, or both. Maps are perfect for counting how often things appear.
Create a free account to unlock every lesson, save your progress, keep your streak and get personal review suggestions. It takes 20 seconds.
Ready to go on a fun coding adventure? First, tell me a little about you: