2 · Make decisions · 7 MIN
Read and fix an error
Errors are clues you can investigate.
NameError points to a name Python cannot find. SyntaxError indicates invalid structure; IndentationError points to a block that is not aligned correctly. Reproduce a small example, read the message, then change one thing.
An error message is a signpost showing where the computer lost the trail.
Read the example
user_name = "Ada" print(user_name)
Check the expected output
Ada
Your challenge
Fix the misspelled name in the starter. The function must return the input doubled.
Common trap
Names are case-sensitive; doubled and doubeld are different.
Next lesson: Reuse a function →