The elements of a program: identifiers, variables and input/output

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• 1 practice task with hints and worked answers
• A quiz that marks itself as you go
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Other lessons in this sub-strand

1. The elements of a program: identifiers, variables and input/output
2. Operators
3. How a program is structured
4. Syntax and the three kinds of error
5. Reserved words you cannot use as names
6. Identifiers and naming rules
7. Data types: integer, float, string and Boolean
8. Type conversion before arithmetic
9. Declaring variables in Python (and how C differs)
10. Constants: VAT, PI and a fee rate
11. Input statements: reading the user
12. Output statements: showing the result
13. Arithmetic operators in Kenyan calculations
14. Relational operators: questions that answer True or False
15. Logical operators: and, or, not
16. Assignment and compound assignment
17. Operator precedence: when in doubt, brackets
18. Standard libraries: math and random