tbd. Thorsten Letschert
An expression is an operation that evaluates its value, it is a combination of one or more constants, variables, functions, and operators that return another value.
3 + 4 #Is an expression which evaluates to 7, with 3 and 4 being two constants
4 ≠ 4 #This expression evaluates to false
An expression basically contains of one or more of these elements:
- Field codes
- Operators
- Functions
Field codes are the heart.... and return different data types
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Ultimately, what can be used in an expression depends on the parsing mode-→
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