Javascript Basics Development Tutorials, Guides & Insights

• Example:

  let result = 10 + 5 * 2; // 20
  // Multiplication happens before addition
  // 10 + (5 * 2) = 10 + 10 = 20

  let resultWithParentheses = (10 + 5) * 2; // 30
  // Parentheses alter the order
  // (10 + 5) * 2 = 15 * 2 = 30

Comments are notes in the code that are ignored by the JavaScript engine. They are useful for explaining what the code does or for temporarily disabling parts of the code.

• Begin with //.
• Example:

JavaScript supports several data types:

• Strings: Text, enclosed in quotes ("Hello", 'Hello').
• Numbers: Numerical values (100, 3.14).
• Booleans: True or false values (true, false).
• Arrays: Collections of values ([1, 2, 3]).
• Objects: Key-value pairs ({name: 'John', age: 30}).

This tutorial assumes no prior knowledge of programming. All you need is a text editor, a web browser, and a willingness to learn.

JavaScript is a high-level, interpreted scripting language primarily used for creating interactive effects within web browsers. Unlike HTML and CSS, which define the structure and style of web pages, JavaScript allows you to add behavior and interactivity to your web pages.