Formula expressions support functions and variables. Follow these syntax rules for functions and variables when you create formula expressions:
Enclose variables or properties with square brackets, [ ]. If you omit square brackets, the variable is treated as a native variable.
Enclose member names with quotation marks (for example, “Account 200”).
Characters in variables are case-insensitive, but cannot have extra spaces or characters such as the underscore ( _ ).
You can include subcalls to other functions within an expression.
The order of the outline is important in a member formula. For example, do not reference a value that has not been calculated yet.