Computer science · University
Values, variables and expressions · revision notes
A concrete piece of data such as a number or string.
Key ideas and conditions
Value
A concrete piece of data such as a number or string.
Variable
A name that refers to a value in a program.
Expression
Code that evaluates to a value.
Type
A category that determines operations and representation for a value.
Explain without looking
- Give a short example showing how Expression would be used in practice.
- Summarize why Type matters in the lesson “Values, variables and expressions”.
Further reading and review references
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