Repeating Actions with Loops - Lesson 3


  • How can I do the same operations on many different values?


  • Explain what a for loop does.
  • Correctly write for loops to repeat simple calculations.
  • Trace changes to a loop variable as the loop runs.
  • Trace changes to other variables as they are updated by a for loop.


Jupyter Notebook File

Please use the Jupyter notebook named "03RepeatingActionsWithLoops.ipynb" for this lesson. If you haven't downloaded them already, you may find them here.

Key Points

  • Use for variable in sequence to process the elements of a sequence one at a time.
  • The body of a for loop must be indented.
  • Use len(thing) to determine the length of something that contains other values.