Question

How are code maintainability and simplicity related?  

Answer 1

The simple code are those which are easier to understand, simpler to implement, if we do simple designing during the development phase then it will become easier for us to understand these codes in future as well, simple codes helps to design the software in an easy manner and also it helps others to understand what the coder wants to do in the coding phase, if the code remain simple then the maintenance of the software will also become easier as the person who is maintaining the software will easily understood the codes written by the coder.

But if the codes are not simple then it become difficult for the person to clearly understood the code and maintain it properly, therefore code simplicity is directly proportional to the code maintainability.