JavaScript Basics

Learn the basic building blocks of JavaScript, including variables, values, data types, and simple JavaScript statements.

What are JavaScript Basics?

JavaScript basics are the fundamental concepts you need before building larger JavaScript programs.

In this module, you will learn how to store data, identify data types, convert values, and work with basic input and output.

JavaScript variables and common data types.

Main Concepts

How a Variable Works

Example 1: Variables

You can create variables using the let and const keywords.

let studentName = "Samadhan";
let course = "JavaScript";
const institute = "CIIT Training Institute";

console.log("Welcome to " + institute + " ❤️🧑‍🎓.....!");
console.log("Student:", studentName);
console.log("Course:", course);

Output

Basic Data Types

JavaScript values can represent different kinds of information, such as text, numbers, and true or false values.

Example 2: Data Types

const institute = "CIIT Training Institute";
const students = 150;
const isLearning = true;

console.log("Institute:", institute);
console.log("Students:", students);
console.log("Learning JavaScript:", isLearning);

console.log("Type of institute:", typeof institute);
console.log("Type of students:", typeof students);
console.log("Type of isLearning:", typeof isLearning);

Output

Type Conversion

Sometimes a value needs to be converted from one type to another. JavaScript provides methods such as Number() and String() for explicit conversion.

Input and Output

JavaScript can display information using console.log(). Browser-based applications can also collect user input through HTML forms and browser APIs.

const name = "CIIT Student";

console.log("Hello " + name);
console.log("Welcome to CIIT Training Institute ❤️🧑‍🎓.....!");

Output

What You Will Learn Next