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## Introduction

This repository was created with the intention of helping developers master their concepts in JavaScript. It is not a requirement, but a guide for future studies. It is based on an article written by Stephen Curtis and you can read it [here](https://medium.com/@stephenthecurt/33-fundamentals-every-javascript-developer-should-know-13dd720a90d1).
This repository was created to help developers master core JavaScript concepts. It is not a requirement, but a guide for further study. It is based on an article written by Stephen Curtis and you can read it [here](https://medium.com/@stephenthecurt/33-fundamentals-every-javascript-developer-should-know-13dd720a90d1).

## Community

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- [украї́нська мо́ва (Ukrainian)](https://github.com/AndrewSavetchuk/33-js-concepts-ukrainian-translation) — Andrew Savetchuk
- [සිංහල (Sinhala)](https://github.com/ududsha/33-js-concepts) — Udaya Shamendra
- [Italiano (Italian)](https://github.com/Donearm/33-js-concepts) — Gianluca Fiore
- [Latviešu (Latvian)](https://github.com/ANormalStick/33-js-concepts) - Jānis Īvāns
- [Afaan Oromoo (Oromo)](https://github.com/Amandagne/33-js-concepts) - Amanuel Dagnachew
- [Latviešu (Latvian)](https://github.com/ANormalStick/33-js-concepts) — Jānis Īvāns
- [Afaan Oromoo (Oromo)](https://github.com/Amandagne/33-js-concepts) — Amanuel Dagnachew
- [ภาษาไทย (Thai)](https://github.com/ninearif/33-js-concepts) — Arif Waram
- [Català (Catalan)](https://github.com/marioestradaf/33-js-concepts) — Mario Estrada
- [Svenska (Swedish)](https://github.com/FenixHongell/33-js-concepts/) — Fenix Hongell
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1. [**Call Stack**](#1-call-stack)
2. [**Primitive Types**](#2-primitive-types)
3. [**Value Types and Reference Types**](#3-value-types-and-reference-types)
4. [**Implicit, Explicit, Nominal, Structuring and Duck Typing**](#4-implicit-explicit-nominal-structuring-and-duck-typing)
4. [**Implicit, Explicit, Nominal, Structural and Duck Typing**](#4-implicit-explicit-nominal-structural-and-duck-typing)
5. [**== vs === vs typeof**](#5--vs--vs-typeof)
6. [**Function Scope, Block Scope and Lexical Scope**](#6-function-scope-block-scope-and-lexical-scope)
7. [**Expression vs Statement**](#7-expression-vs-statement)
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---

## 4. Implicit, Explicit, Nominal, Structuring and Duck Typing
## 4. Implicit, Explicit, Nominal, Structural and Duck Typing

<p>The ECMAScript specification defines JavaScript as a dynamically typed language, meaning that types are associated with values rather than variables, and type checking occurs at runtime. There are various ways JavaScript manages types:</p>

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