# Calculation field

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The values in the calculation fields are calculated from the expressions specified by you.

The following types of expressions are supported:

- Mathematical - Expression involving numbers.
- String - String can also be added together, compared, etc...
- Boolean - Expression that evaluate to true (1.0) and false (0.0).
- Numeric and string types can not be mixed in a left / right operand pair.

## Variables

Variables are values of other fields in the same record.

Variable must be enclosed by a pound sign and open brace #{ and a closed brace }. i.e. expression = "#{field_name1} + #{field_name2}"

String values/variables must be enclosed by Quote characters:

`'Result: ' + '#{string_field1}' + '#{string_field2}'`