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Two Lesson Types

As we talked about, there are 2 types of coding lessons on Boot.dev:

  1. Console output lessons
  2. Unit-test lessons

Console Output Lessons
  • Only 1 file of code, usually with a comment explaining where to write your code
  • When you "submit" your code, its console output must match the expected output exactly to pass
  • Debug print statements will cause your code to fail submission, so remove them before submitting

Unit-Test Lessons
  • 2 files of code: main and main_test. You can read the tests but you can't edit them
  • When you "submit" your code, the return values of your functions must match the expected values exactly to pass
  • Console output is ignored, you can leave debug print statements in your code

Which Is More Common?

Going forward, you'll encounter far more unit-test lessons than console output lessons, but you'll still see both from time to time. Different concepts are better suited to different types of lessons.