Data Types

Data Types

Data types define what information is stored

The most used of them are:

Type Description Example
numeric Whole number or floating point number. let num1 = 5;

let num2 = 2.45;
string Sequence of characters (text). let text = 'JS is awesome!';
boolean Can have only 2 values - true or false. let isAwesome = true;

Printing Data

It's done using console.log.


The variables are used to store data of certain type.

Their value can be changed any time.

Example of variables definitions:

Basic program example:

Write a program in which variables are defined and printed.