Template
to continue. (After that any entries made into the worksheet will be automatically saved, and you can re-load the partially-completed worksheet in future - at which point you will be asked to auto-save it again).
Enter your name:

### Preliminaries

- Set the browser to Full Screen view, to give this worksheet, and your code, as much space as possible.
- Select File > New to start a new program, then select File > Auto Save and complete the dialog to ensure that your code is always saved. Remember that you can use the Undo button (or Ctrl-z) to undo recent changes.
- Remember that if the code editor has a tinted background it does not have focus and will not respond to edits. To give it focus click within the editor. (If a program is running, you will need to stop it first.)
- Use the auto-completion options as much as possible, because this reduces errors.
- Use the Hints only when you need them - as all use of hints is recorded. Use of Help is encouraged and not recorded.

Preliminaries completed

### Step 1

Hint: Title
Step completed Total hints used: /
Worksheet completed.
This worksheet is copyright © Richard Pawson 2025, and protected by the Creative Commons license: Attribution-NonCommercial-NoDerivatives 4.0 International. If you copy and modify this worksheet you may not distribute your modified version (outside your own teaching institution) without the author's permission. Please email the author to report errors or suggest improvements.