Case does not matter, but SPELLING and SPACING do.
TEXT, arranged in a specific order.
LENGTH because there is already a calculation named LENGTH, so you could name it something like SHAPELENGTH.
a. Field References
b. Constants
c. Operators
Pi*Diameter?
a. Pi is the CONSTANT
b. * is the OPERATOR
c. “Diameter” is the NAME OF THE FIELD.
All the values are replaced. Then the OPERATORS tell FileMaker what to do with those values, and then FileMaker returns the result.
They refer FileMaker to the data in the field you’re referring to. Since the data in those fields may change on every record, the values that get replaced in each record are different and may yield a different result.
They stay the same each time FileMaker does a calculation
They tell FileMaker how to treat the values in the calculation.