What is the use of data type in JavaScript?

What are the data types in JavaScript?

JavaScript types

  • Primitive values (immutable datum represented directly at the lowest level of the language) Boolean type. Null type. Undefined type. Number type. BigInt type. String type. Symbol type.
  • Objects (collections of properties)

What are JavaScript data types with examples?

JavaScript Data Types

Data Types Description Example
String represents textual data ‘hello’ , “hello world!” etc
Number an integer or a floating-point number 3 , 3.234 , 3e-2 etc.
BigInt an integer with arbitrary precision 900719925124740999n , 1n etc.
Boolean Any of two values: true or false true and false

Why are data types important in JavaScript?

Data types are used to classify one particular type of data in programming languages. … This is to say, to be able to do operations with variables in JavaScript, it is important to understand the data type of any given variable.

What are the 5 data types?

Data types

  • String (or str or text). Used for a combination of any characters that appear on a keyboard, such as letters, numbers and symbols.
  • Character (or char). Used for single letters.
  • Integer (or int). Used for whole numbers.
  • Float (or Real). …
  • Boolean (or bool).

What is data type example?

This data comes in different forms. Examples include: your name – a string of characters.

Discussion.

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Data Type Represents Examples
floating point (real) fractional numbers -87.5 , 0.0 , 3.14159
string A sequence of characters “Hello world!”
Boolean logical true or false true , false
nothing no data null

How many types of data types are there?

4 Types of Data: Nominal, Ordinal, Discrete, Continuous.

What is JSON format?

JavaScript Object Notation (JSON) is a standard text-based format for representing structured data based on JavaScript object syntax. It is commonly used for transmitting data in web applications (e.g., sending some data from the server to the client, so it can be displayed on a web page, or vice versa).

Is array a data type?

In computer science, an array type is a data type that represents a collection of elements (values or variables), each selected by one or more indices (identifying keys) that can be computed at run time during program execution. Such a collection is usually called an array variable, array value, or simply array.

What is the main use of JavaScript?

JavaScript is a text-based programming language used both on the client-side and server-side that allows you to make web pages interactive. Where HTML and CSS are languages that give structure and style to web pages, JavaScript gives web pages interactive elements that engage a user.

What are advantages of JavaScript?

Advantages of JavaScript

  • Speed. Client-side JavaScript is very fast because it can be run immediately within the client-side browser. …
  • Simplicity. JavaScript is relatively simple to learn and implement.
  • Popularity. …
  • Interoperability. …
  • Server Load. …
  • Gives the ability to create rich interfaces.