Javascript Format Number

Overview

In JavaScript, all types of numbers, including integers, floats, and decimal values, are considered primitive data types. Number manipulating methods are available in javascript, but they all work with objects. Even though these methods cannot be used on primitive data types, we can use javascript's number manipulation functions on primitive datatypes of numbers because this language treats each fundamental datatype as an object in javascript format number.

Introduction

In comparison to Java, C, and C++, JavaScript does not have integer, float, or double data types for numbers. JavaScript instead makes use of a Number data type, which is double by default. Numeric values are represented by the number data type. It can be applied to both floating-point and integer numbers in javascript number format.

In most cases, converting a long float value to a precision of 2 or 3 comes up while programming. Like 3.141592 => 3.14. Additionally, you may need to convert a number to another unit of currency, such as 100 to $100, or to a general big number into a comma-separated number, such as 1000000000 to 1,000,000,000.

The image below shows these problems, which can be resolved by formatting the numbers.

Introduction

Syntax

The syntax of javascript format number for a number with up to two decimal places using the toFixed() method is as follows:

Parameters

Locale (optional): If ignored, the host environment's current locale will be used by the method (e.g., default browser language)
Options (optional): Formatting options for the object

Limit to Two Significant Digits

Use Default Locale and Custom Number Formatting

In javascript number format, To use the browser's default locale set the first parameter to undefined.

Change Formatting Style

There are three possible values for a style property in javascript format number:

percent
currency
unit

Style: Percentages

In some languages, percentage localization is a challenging task. Not all languages put the percentage sign after a number. For example, in Arabic languages.

Style: Currencies

To format a number into a string, use the style property in the options object with the value currency.

To change currency formatting using javascript format number, you can change the currencyDisplay property. These are possible values:

symbol (default)
code
name

Style: Units

One of the most understated locale features in javascript is units style. You can format numbers into any widely used units with the appropriate formatting for a given locale. for example:

List of JavaScript Number Locale Units

You can check all of the unit property's values in the javascript number format below.

unit value	unit value	unit value
acre	gigabit	minute
byte	hour	minute
bit	hectare	ounce
centimeter	inch	petabyte
celsius	kilobyte	percent
degree	kilobit	pound
day	kilometer	pound
fahrenheit	liter	second
foot	megabit	terabyte
fluid-ounce	megabyte	terabit
gigabyte	mile	week
gallon	meter	year
gram	mile-scandinavian	yard

Kilometer Per Hour

The keyword per can be used to combine two values, such as X-per-Y. such as kilometers per hour. JavaScript will format this compound unit using the most appropriate localized pattern.

Terabyte Per Gram

Any combination is acceptable for the unit property in javascript number format. The unit property doesn't have to make any sense.

Conclusion

In JavaScript, all types of numbers, including integers, floats, and decimal values, are considered primitive data types.
Number manipulating methods are available in javascript, but they all work with objects.
In comparison to Java, C, and C++, JavaScript does not have integer, float, or double data types for numbers.
Numeric values are represented by the number data type. It can be applied to both floating-point and integer numbers in javascript number format.
In some languages, percentage localization is a challenging task. Not all languages put the percentage sign after a number.
The keyword per can be used to combine two values, such as X-per-Y. such as kilometers per hour.