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## Number Types

- Use the asterisk * for multiplication (not dot or cross).
- Comments are denoted by `/* comment text */`
  - Ignored by the compiler.
  - Explains the program to other programmers or yourself.
- Variable naming rules:
- Names must start with a letter.
  - Remaining characters are letters or underscore (`_`) (no spaces or special symbols)
  - You cannot use reserved words.
  - Variable names are case-sensitive.

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