JavaScript Number() Constructor
Javascript Number() Constructor is used to create a new number object but, if we call it as a function on another data type it will perform type conversion to number if possible.
Syntax:
Number(object)
Parameters: This function accepts a single parameter as mentioned above and described below:
- object: This parameter holds the objects that will be converted to any type of javascript variable to number type.
Return Values: The number() constructor returns the number format for any type of javascript variable.
Below are examples of the Number() Constructor:
Example 1: In this example, we will create a new number using Number Constructor
Javascript
function func() { let a = new Number(5); console.log(a);}func(); |
Output:
Number {5}
Example 2: In this example, we will convert a Number String to Number using Number constructor as a function.
Javascript
function func() { // Original string let a = "10"; let value = Number(a); console.log(value);}func(); |
Output:
10
Example 3: In this example, we will convert the date into a number, and the conversion will return the converted date in milliseconds.
Javascript
function func() { let value = Number(new Date("2017-09-30")); console.log(value);}func(); |
Output:
1506729600000
Example 4: In this example, we will convert a Non-Number String to a Number using the Number constructor as a function.
Javascript
function func() { let value = Number("John"); console.log(value);}func(); |
Output: The conversion fails as no number value is detected when conversion takes place
NaN
Supported Browsers:
- Google Chrome
- Firefox
- Internet Explorer
- Safari
- Opera
We have a complete list of JavaScript Number constructor, properties, and methods list, to know more about the numbers please go through that article.
