Use parentheses effectively

As a best practice, Guidewire recommends that you always use parentheses to make explicit the operator order of precedence in computational expressions. Otherwise, your computations can be harder to read and more likely to contain mistakes.

In the following example, the two expressions produce the same results, but the first expression uses parentheses to make the standard operator order clear:

value = rate + (limit * 10.5) + (deductible / autoGrade) - 15    // clear order of precedence

value = rate + limit * 10.5 + deductible / autoGrade - 15        // same result, but poor form

In the following example, using parentheses in the second Boolean expression ensures that it is read correctly:

a == b or (c == d and e == f)    // clear order of precedence

a == b or c == d and e == f      // same result, but poor form