Changes

Whilst the above code is perfectly valid it is important to be aware that Objective-C does not evaluate the expression from left to right or right to left, but rather in an order specified by the precedence of the various operators. ''Operator precedence'' is an important topic to understand since it impacts the result of a calculation and will be covered in detail the chapter entitled [[Objective-C 2.0 Operator Precedence]].

== Compound Assignment Operators ==