Mozilla
developer.mozilla.org › en-US › docs › Web › JavaScript › Guide › Data_structures
JavaScript data types and data structures - JavaScript | MDN
All primitive types, except null and undefined, have their corresponding object wrapper types, which provide useful methods for working with the primitive values. For example, the Number object provides methods like toExponential(). When a property is accessed on a primitive value, JavaScript automatically wraps the value into the corresponding wrapper object and accesses the property on the object instead.
JavaScript.info
javascript.info › tutorial › the javascript language › javascript fundamentals
Data types
BigInt type was recently added to the language to represent integers of arbitrary length. A BigInt value is created by appending n to the end of an integer: // the "n" at the end means it's a BigInt const bigInt = 1234567890123456789012345678901234567890n; As BigInt numbers are rarely needed, we don’t cover them here, but devoted them a separate chapter BigInt. Read it when you need such big numbers. A string in JavaScript must be surrounded by quotes.
Videos
TutorialsTeacher
tutorialsteacher.com › javascript › javascript-number
JavaScript Numers: Integer, Float, Binary, Exponential, Hexadecimal, Octal
The Number type includes some default properties. JavaScript treats primitive values as objects, so all the properties and methods are applicable to both literal numbers and number objects. The following table lists all the properties of Number type.
W3Schools
w3schools.com › js › js_numbers.asp
JavaScript Numbers
JavaScript numbers are always stored as double precision floating point numbers, following the international IEEE 754 standard. This format stores numbers in 64 bits, where the number (the fraction) is stored in bits 0 to 51, the exponent in bits 52 to 62, and the sign in bit 63: Most programming languages have many number types:
Mozilla
developer.mozilla.org › en-US › docs › Web › JavaScript › Guide › Numbers_and_strings
Numbers and strings - JavaScript | MDN
See also JavaScript data types and structures for context with other primitive types in JavaScript. You can use four types of number literals: decimal, binary, octal, and hexadecimal.
GeeksforGeeks
geeksforgeeks.org › javascript › javascript-numbers
JavaScript Numbers - GeeksforGeeks
It has only one type of number and it can hold both with or without decimal values. ... If the number starts with 0 and the following digits are smaller than 8. It will be parsed as an Octal Number. ... They start with 0b or 0B followed by 0's and 1's. ... In JavaScript, coercion refers to the automatic or implicit conversion of values from one data type to another.
Published July 11, 2025
W3Schools
w3schools.com › js › js_datatypes.asp
JavaScript Data Types
In the first example, JavaScript treats 16 and 4 as numbers, until it reaches "Volvo". In the second example, since the first operand is a string, all operands are treated as strings. JavaScript has dynamic types.
Wes Bos
wesbos.com › javascript › 01-the-basics › types-numbers
Types - Numbers - Wes Bos
Open types.html in the browser and then open the console and type typeof age and hit enter. The console should return to you "number". typeof is a keyword in JavaScript that allows you to check the type of a value.
MDN Web Docs
developer.mozilla.org › en-US › docs › Web › JavaScript › Reference › Global_Objects › Number
Number - JavaScript | MDN
Creates Number objects. When called as a function, it returns primitive values of type Number. ... The smallest interval between two representable numbers. ... The maximum safe integer in JavaScript (253 - 1).
Programiz
programiz.com › javascript › data-types
JavaScript Data Types (with Examples)
Note: JavaScript data types are divided into primitive and non-primitive types. Primitive Data Types: They can hold a single simple value. String, Number, BigInt, Boolean, undefined, null, and Symbol are primitive data types.
MDN Web Docs
developer.mozilla.org › en-US › docs › Web › HTML › Reference › Elements › input › number
<input type="number"> - HTML | MDN
In addition to the attributes commonly supported by all <input> types, inputs of type number support these attributes. The values of the list attribute is the id of a <datalist> element located in the same document. The <datalist> provides a list of predefined values to suggest to the user for this input.
web.dev
web.dev › learn › javascript › data-types › number
Numbers | web.dev
This object behaves as its assigned ... > false · JavaScript only has one number type: 64-bit IEEE 754-1985 double precision floating-point numbers between -2^1024 and 2^1024....
JavaScript Tutorial
javascripttutorial.net › home › javascript tutorial › javascript number type
JavaScript Number Type
October 6, 2023 - x = 123.5; console.log(x.toPrecision(2)); // "1.2e+2"Code language: JavaScript (javascript) The following table illustrates the differences between a Number object and a primitive number: ... let numberObject = new Number(10); let number = 10; // typeof console.log(typeof numberObject); console.log(typeof number); // instanceof console.log(numberObject instanceof Number); // true console.log(number instanceof Number); // falseCode language: JavaScript (javascript)
Angular.love
angular.love › here-is-what-you-need-to-know-about-javascripts-number-type
JavaScript’s Number type - what you need to know it
According to the ECMAScript standard, there is only one type for numbers and it is the ‘double-precision 64-bit binary format IEEE 754 value’. This type is used to store both integers and fractions and is the equivalent of `double` data ...
JavaScript Tutorial
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JavaScript Numbers
November 15, 2024 - When you perform arithmetic operations on floating-point numbers, you often get the approximate result. For example: let amount = 0.2 + 0.1; console.log(amount);Code language: JavaScript (javascript) ... JavaScript introduced the bigint type starting in ES2022.
Programiz
programiz.com › javascript › numbers
JavaScript Number (with Examples)
Here is a list of built-in number methods in JavaScript. // check if num1 is integer let num1 = 12; console.log(Number.isInteger(num1)); // true // check if num2 is NaN let num2 = NaN; console.log(Number.isNaN(num2)); // true // display up to two decimal points let num3 = 5.1234; console.log(num3.toFixed(2)); // 5.12 ... When + is only used with numbers, it adds those numbers. For example, let num = 4 + 9; console.log(num); // 13 console.log(typeof num); // number
Study.com
study.com › courses › computer science courses › introduction to javascript
Numeric Data Types in JavaScript: Definition, Functions & Use | Study.com
This datatype accommodates integers, decimal numbers (also called floating-point numbers) as well as numbers written in scientific notation. These can all be either positive or negative numbers.
Top answer 1 of 5
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UPDATE: with a new ES2020 standard released this answer is not entirely correct anymore, see the other answer (from @Mathias Lykkegaard Lorenzen) about BigInt details.
There is only the Number data type in JS that represents numbers.
Internally it is implemented as IEEE 754 double precision floating point number.
What it means is that - technically there is no dedicated data type that represents integer numbers.
Practically it means that we can safely use only numbers that are safely representable by the aforementioned standard. And it includes integer values in the range: [-9007199254740991; 9007199254740991]. Both values are defined as constants: Number.MIN_SAFE_INTEGER and Number.MAX_SAFE_INTEGER correspondingly.
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I should mention that there is actually a type called BigInt which represents a true integer.
However, because it can't be used with Number and is generally only a good idea to use for larger numbers, I wouldn't advise it.
I thought it was worth a mention though.
var n = BigInt(1337);
console.log(typeof n); //prints "bigint"
Luis Llamas
luisllamas.es › inicio › cursos › curso javascript
The Number Type in JavaScript
December 6, 2024 - Unlike other languages that have different types for integers and floating-point numbers, JavaScript uses a single type for both cases.
DEV Community
dev.to › imsushant12 › a-guide-to-master-numbers-data-type-in-javascript-37m4
A Guide to Master Numbers Data Type in JavaScript - DEV Community
July 20, 2024 - In JavaScript, numbers are stored as 64-bit floating-point values (double precision) following the IEEE 754 standard. This means that there's a single number type in JavaScript that can represent both integer and floating-point numbers.