Introduction
Functions are a core tool in a programmer's toolkit for writing maintainable code. The concept of a function is common in almost every programming language. Functions have different names in various languages: procedures, routines, and many more, but they all have two main characteristics in common:
They represent a sequence of instructions grouped together.
The sequence of instructions is identified by a name, which can be used to refer to the function.
The programmer can call, or invoke a function when the functionalities provided by the function are needed.
When the function is called, the sequence of instructions is executed. The caller can also provide some data to the function to be used in operations within the program. The following are the main advantages of using functions:
Reduces repetition: It often occurs that a program needs to repeat the same operations in different parts of the codebase. Functions allow us to write a single implementation that is carefully tested...
