Ethical Hacking Tutorial: JavaScript

Monday, July 9, 2018

The syntax for creating a number object is as follows −

var val = new Number(number);

In the place of number, if you provide any non-number argument, then the argument cannot be converted into a number, it returns NaN (Not-a-Number).

Number Properties

Here is a list of each property and their description.

Sr.No	Property & Description
1	MAX_VALUE The largest possible value a number in JavaScript can have 1.7976931348623157E+308
2	MIN_VALUE The smallest possible value a number in JavaScript can have 5E-324
3	NaN Equal to a value that is not a number.
4	NEGATIVE_INFINITY A value that is less than MIN_VALUE.
5	POSITIVE_INFINITY A value that is greater than MAX_VALUE
6	prototype A static property of the Number object. Use the prototype property to assign new properties and methods to the Number object in the current document
7	constructor Returns the function that created this object's instance. By default this is the Number object.

In the following sections, we will take a few examples to demonstrate the properties of Number.

The Number object contains only the default methods that are a part of every object's definition.

Sr.No	Method & Description
1	toExponential() Forces a number to display in exponential notation, even if the number is in the range in which JavaScript normally uses standard notation.
2	toFixed() Formats a number with a specific number of digits to the right of the decimal.
3	toLocaleString() Returns a string value version of the current number in a format that may vary according to a browser's local settings.
4	toPrecision() Defines how many total digits (including digits to the left and right of the decimal) to display of a number.
5	toString() Returns the string representation of the number's value.
6	valueOf() Returns the number's value.

In the following sections, we will have a few examples to explain the methods of Number.