# Derived Values A common use for methods is to provide a value that is derived from the values of other fields. ```java class Elmo { int age; int nextAge() { return age + 1; } } void main() { Elmo elmo = new Elmo(); elmo.age = 3; System.out.println("Elmo is " + elmo.age + " right now,"); System.out.println("but next year Elmo will be " + elmo.nextAge()); } ``` Which is useful for situations like where you store someones first and last name