What are "Pure Functions" and "Side Effects"?

You might've heard about "pure functions". Maybe also about "side effects" or "impure functions". There is no wrong or right here - you will need all these things in most applications, but it is crucial to understand what these terms actually means and what you should watch out for. What is "State":    • What is "State" in Programming?   Want to learn more about JavaScript or NodeJS? Explore our courses (and get some nice discounts)! JavaScript - The Complete Guide: https://acad.link/js NodeJS - The Complete Guide: https://acad.link/nodejs Or get ALL ours courses for one low price with our monthly or annual memberships: https://pro.academind.com Join our free Academind Community on Discord:   / discord   Check out all our other courses: https://academind.com/learn/our-courses ---------- • Go to https://www.academind.com and subscribe to our newsletter to stay updated and to get exclusive content & discounts • Follow @maxedapps and @academind_real on Twitter • Follow @academind_real on Instagram:   / academind_real   • Join our Facebook community on   / academindchannel   See you in the videos! ---------- Academind is your source for online education in the areas of web development, frontend web development, backend web development, programming, coding and data science! No matter if you are looking for a tutorial, a course, a crash course, an introduction, an online tutorial or any related video, we try our best to offer you the content you are looking for. Our topics include Angular, React, Vue, Html, CSS, JavaScript, TypeScript, Redux, Nuxt.js, RxJs, Bootstrap, Laravel, Node.js, Progressive Web Apps (PWA), Ionic, React Native, Regular Expressions (RegEx), Stencil, Power BI, Amazon Web Services (AWS), Firebase or other topics, make sure to have a look at this channel or at academind.com to find the learning resource of your choice!