Functional Programming For - Dummies

: Once you create a piece of data, you never change it. If you need a modified version, you create a whole new copy with the changes.

: 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

If you want to write code like a functional programmer, you need to follow these basic rules: : Once you create a piece of data, you never change it

: In FP, functions are treated like any other variable. You can pass them as arguments to other functions or return them as results. Why Bother Learning It

While it can be a challenging mindset shift, FP offers several major benefits: Fundamentals of functional programming | by Jonas Neumann

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 gives the same output for the same input and has no side effects (it doesn't change anything outside itself, like updating a database).