Advantages of Methods

Function reduce the complexity of program by dividing the into smaller modules, thus making them easier to read and debug.
Function enhance reusability of code and can be called from any where in a program and any number of time.
Function are useful in hiding the implementation details.
It is easier to edit a program, which is written using methods. While working on one function, one can focus on just that part of the program by debugging, constructing and making it perfect.