FUNCTIONAL PROGRAMMING

1. What is functional programming?
   • Functional programming is a programming paradigm — a style of building the structure and elements of computer programs — that treats computation as the evaluation of mathematical functions and avoids changing-state and mutable data.
2. What is a pure function and how do we know if something is a pure function?
   • Does not cause side effects and returns and give same results for same arguments.
3. What are the benefits of a pure function?
   • Easier to test codes
4. What is immutability?
   • Not changing the state of data after creation
5. What is Referential transparency?
   • Yielding the same results for the same input
6. What is a module?
   • simple or complex functionality organized in single or multiple JavaScript files which can be reused throughout the Node. js application
7. What does the word ‘require’ do?
   • Import
8. How do we bring another module into the file the we are working in?
   • by require them.