JavaScript Basics with 50+ Coding Exercises

Learn to run JavaScript in Visual Studio Code by creating a JS mastery folder, writing a greet function in app.js, and executing it in the integrated terminal with node.

Explore JavaScript coding in Chrome DevTools, focusing on the sources panel to create and run snippets. Test code in the browser console and debug in real time.

Navigate the Udemy coding exercise, read the problem statement, and implement your solution in the code editor using the exact variable name. Run tests and review results to refine.

Learn how JavaScript comments clarify code by using single-line and multi-line syntax, briefly explaining code, marking notes, and keeping comments up to date to complement clean code.

Learn how console.log outputs data in JavaScript, including strings, numbers, objects, and arrays, using multiple arguments to debug and understand code in the terminal.

Explore how variables act as named storage to hold strings, numbers, booleans, and objects in JavaScript, enabling dynamic and interactive web apps.

Explore var, let, and const in JavaScript, their function and block scopes, redeclaration rules, and mutability, plus global concepts like window and global.

Define a global var and assign a value, then create and call a function that prints it with console.log. Run the code to see the value printed globally.

Master the let keyword to declare block-scoped variables, understand the temporal dead zone, avoid hoisting issues, and learn let behavior in loops for reliable JavaScript coding.

Navigate JavaScript variable naming rules with camel case, underscores, and dollar signs, using readable names, and avoid starting with numbers, hyphens, spaces, or reserved keywords.

Declare constants with the const keyword to prevent reassignment after initialization. Note that const is block scoped and may hold objects or arrays that can still be mutated.

Declare constants with various data types and define a person object with first name, last name, and age, then display the object in the console with console.log.

Explore block-scoped constants inside a function, learn how const and block scope restrict access to variables within the block, and why accessing them outside triggers an error.

Learn how constants are affected by the temporal dead zone, where accessing a const before declaration yields a reference error; the example declares it before access, avoiding the error.