Conditionals in JavaScript

Introduction to the syntax and semantics of conditionals in JavaScript.

Conditionals features

A program conditional has the following:

  • A condition which can be true or false
  • A program block executed when the condition is true
  • A program block executed when the condition is false

With these features in mind, let’s map them to the corresponding JavaScript syntax.

Keywords and semantics

In JavaScript, a conditional statement consists of various properties and keywords.

if condition

The if-condition is the starting point of a conditional. The syntax is as ...