Chapter 2: Programming Basics

In the last chapter, we introduced JavaScript, then set up a programming environment. We even got our hands dirty with a few JavaScript programs. In this chapter, we’ll delve further and learn how JavaScript works, as well as write some more programs.

This chapter will cover the following topics:

  • The importance of well-commented code

  • JavaScript grammar ― expressions, statements, semicolons and whitespace

  • Primitive data types

  • Strings ― string literals, string properties and methods

  • Declaring and assigning constants and variables

  • Numbers ― decimal, hexadecimal, octal, binary and exponent form, Infinity, and NaN

  • Arithmetic operations such as +, -, *, /, and %

  • Undefined and null

  • Booleans ― truthy and falsy ...

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