Functional Programming For Dummies -

: A function is "pure" if it always gives the same output for the same input and has no side effects (it doesn't change anything outside itself, like updating a database).

: You focus on the logic of what needs to be solved rather than the specific control flow (like for or while loops). Why Bother Learning It? Functional Programming For Dummies

Functional programming (FP) is a style of coding where you treat software as a series of mathematical functions rather than a list of instructions. Instead of telling the computer to do something step-by-step, you describe what you want to happen. The Core Pillars of Functional Programming : A function is "pure" if it always