human
What is a functional programming language? How is it different from imperative languages?
gpt
Functional programming is a programming paradigm where computation is treated as the evaluation of mathematical functions and mutable data is avoided. It is different from imperative programming, which relies on changing the state of a program and modifying data. Functional languages like Haskell, Lisp, Scheme, and ML promote immutability, no side-effects, first-class and higher-order functions, recursion and declarative approach. Meanwhile imperative languages like C, C++, Java, Python focus on giving a sequence of statements that change a program state and how the code should execute step-by-step.
human
How do I learn Java?
gpt
You can start learning Java by following a free online course, like the ones offered by Codecademy, Coursera, or freeCodeCamp. Beyond that, a good way is to experiment with the language by writing your own programs, looking up documentation as needed to reach your goals.