(UPI) Chapter 3: Fundamentals of JavaScript Programming

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In this chapter, we delve into foundational concepts of JavaScript that are essential for any programmer to master. We begin by exploring the nuances of Automatic Semicolon Insertion (ASI) and the role of reserved words in JavaScript, which are crucial for understanding how JavaScript interprets and executes code. Following this, we introduce the basics of variables in JavaScript, emphasizing their usage and practical examples that illustrate their importance in storing and manipulating data. We then move on to a comprehensive guide on JavaScript Regular Expressions (Regex), a powerful tool for pattern matching and text manipulation. The section concludes with an in-depth examination of JavaScript's primitive data types—Boolean, Undefined, Null, and Symbol—along with numeric data types such as Number and BigInt, which are fundamental to performing various operations in JavaScript.