16 Object-Oriented Programming and Inheritance
Defining a function and calling it from several places saves you from having to copy and paste source code. Not duplicating code is a good practice, because if you need to change it (either for a bug fix or to add new features), you only need to change it in one place. Without duplicate code, the program is also shorter and easier to read.
Similar to functions, inheritance is a code reuse technique that you can apply to classes. It’s the act of putting classes into parent-child relationships in which the child class inherits a copy of the parent class’s methods, freeing you from duplicating a ...
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