Activate Web Pages With JavaScript
JavaScript is a high-level, versatile, and dynamically-typed programming language primarily used for web development. It is primarily used in creating dynamic and interactive web pages. It is important to note: do note mistake JavaScript with Java, they are two completely different programming languages.
A brief history on JavaScript. JavaScript was invented by Brendan Eich in 1995, developed for Netscape 2 (a now obsolete web browser that was popular back in the day), and became the ECMA-262 standard in 1997[1]. It is now maintained by the Mozilla foundation.
Now let us answer some questions regarding JavaScript.
What are variables in JavaScript?
Variables in JavaScript are used to store and manage data. They act as containers for values, which can be numbers, strings, objects, functions, or any type of data allowable (JavaScript is considered loosely typed). Example:
const myVar;
let myVar2;
var myVar3;
What does it mean to declare a variable?
Declaring a variable in JavaScript means to give the variable a name using using one of three keywords: var, let, or const. The choice of keyword determines the variable’s scope (the block level in which the variable can be read, such as globally throughout the script or within a specific function) and mutability (the ability to redeclare the variable). Example:
const myVar;
let myVar2;
var myVar3;
What is an “assignment” operator, and what does it do?
The assignment operator is a singular equal sign = and it assigns a value to a variable. Example:
let thisThing = thatThing;
What is information received from the user called?
Information received from a user is called an input.