At least Python will give you a diagnostic. Ruby is worse; even with parentheses ... salary = 100500 newsalary = (salary * 0.02 + salary) newsal

At least Python will give you a diagnostic. Ruby is worse; even with parentheses ... salary = 100500 newsalary = (salary * 0.02 + salary) newsalary will the same as salary. There are no diagnostics. Yes, you can fix it by moving the + up a line but this should be a purely style thing, not semantics.