DEVI - Simple Expressions, Terms, and Operators - Expressions, Terms and Operators

Expression

A formula telling the computer exactly how to generate the desired value.
An expression has a type and a value.
An expression must be evaluated at run-time in order to determine its value.

E.g. Var1 * Var2

Evaluation

To Evaluate an expression means to follow the instructions.
The value may be different each time at runtime but the type does not change.

Term

Part of an expression that evaluates to a value.
It can be anything as long as the function returns a value.
A term can also be another expression surrounded by parentheses.

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