See how Terminal43 Code works

Three modules, one platform. Scroll to see Challenges, Games, and Reps in action.

01 · Challenges

Real coding problems in 4 languages

Pick a problem, write code in Python, C, C++, or JavaScript, hit Run. Tests run on our secure servers and results come back in seconds.

  • 600+ problems graded automatically
  • Switch languages without leaving the editor
  • Test cases, stdout, and runtime in one view
sum_of_evens.py
✓ All tests pass 5 / 5 42 ms
1
Episode 1: Onboarding @ Sentinel
60 steps · completed
+250 XP
2
Episode 2: The Encoded Note
55 steps · in progress
+0 XP
+50
3
Episode 3: Combing the Logs
55 steps · locked
Locked
02 · Games

Sentinel: learn security through a story

13 episodes, 60+ steps each. Solve real coding puzzles inside a plot you actually want to follow. Earn XP, level up, unlock the next episode.

  • 13 hand-crafted episodes (Season 1)
  • Real Python / shell / network puzzles, not multiple choice
  • Leaderboard, badges, story arc
03 · Reps

3 minutes a day, tap to answer

Bite-sized drills on your phone or laptop. Read the code, tap the right answer, move on. Streaks, hearts, crowns, the works. Try a mini-set right here, no signup needed.

  • 500+ Python drills, plus C, C++, JavaScript, MySQL
  • Spaced repetition surfaces the ones you keep missing
  • Daily streak that actually means something
Question 1 of 4 ⌨️ 5/5

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