Coding Challenges
Hands-on interactive exercises to sharpen your skills. Select a topic to begin.
freeCodeCamp
advanced 5 exercises
back end development and apis projects
advanced 20 exercises
basic data structures
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build a probability calculator project
advanced 171 exercises
daily coding challenges python
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intermediate algorithm scripting
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lab bookmark manager app
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lab date conversion
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lab debug pet adoption page
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lab game character stats
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lab html entitiy converter
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lab mood board
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lab quicksort
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lab reusable footer
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lab slice and splice
advanced 8 exercises
learn intermediate oop by building a platformer game
advanced 23 exercises
learn list comprehension by building a case converter program
advanced 26 exercises
project euler problems 201 to 300
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quality assurance projects
advanced 22 exercises
workshop flexbox photo gallery
Exercism
beginner 92 exercises
bash
beginner 138 exercises
javascript
beginner 128 exercises
python
beginner 104 exercises
ruby
intermediate 126 exercises
elixir
intermediate 137 exercises
go
intermediate 87 exercises
kotlin
intermediate 98 exercises
rust
intermediate 109 exercises
typescript
advanced 117 exercises
crystal
advanced 87 exercises
julia
advanced 97 exercises