How to create a Number object using JavaScript ?

In this article, we will discuss how to create a Number object using JavaScript. A number object is used to represent integers, decimal or float point numbers, and many more. The primitive wrapper object Number is used to represent and handle numbers. examples: 20, 0.25.

We generally don't need to worry about number objects. The Number() function can be used to convert values of different types to numbers. Generally, primitive values like integers don't have methods associated with them.

Syntax:

let n=new Number(val);  

Parameter:  This method takes one parameter that is converted to any javascript variable.

Return Value: The number() function returns the number format for any type of javascript variable. If the given value cannot be converted to a number then it returns Nan. Nan represents "Not a number" but primitive values are treated as objects in javascript. 

Normally declaring a number:

<script>
    a = 10; // integer value
    b = 1.25; // float value
</script>

Example: Creating a number object.

// creating a number object
let num = Number("10");
console.log(num == 10);// true

Output:

True

Properties Of JavaScript Number:

• Number.MAX_VALUE: It's the maximum possible value a javascript number can have (2^53 - 1) OR 1.7976931348623157e+308.
• Number.MIN_VALUE: It's the maximum possible value a javascript number can have -(2^53 - 1) or 5e-324.
• Number.NAN: It returns "undefined".
• Number.NEGATIVE_INFINITY: It's a particular value that represents negative infinity. it has a lower value than MIN_VALUE.
• Number.POSITIVE_INFINITY: It's a particular value that represents positive infinity.  it has a greater value than MAX_VALUE.

Below are the example in order of the above mentioned properties of JavaScript Number:

Example 1:  It's the maximum possible value a javascript number can have (2^53 - 1) OR 1.7976931348623157e+308.

let num = Number.MAX_VALUE;
console.log(num);

Output:

1.7976931348623157e+308

Example 2:  It's the maximum possible value a javascript number can have -(2^53 - 1) or 5e-324.

let num = Number.MIN_VALUE;
console.log(num);

Output:

5e-324

Example 3: It returns "undefined".

let num = Number.NAN;
console.log(num);

Output:

undefined

Example 4: It's a particular value that represents negative infinity. it has a lower value than MIN_VALUE.

let num = Number.NEGATIVE_INFINITY;
console.log(num);

Output:

-Infinity

Example 5: It's a particular value that represents positive infinity.  it has a greater value than MAX_VALUE.

let num = Number.POSITIVE_INFINITY;
console.log(num);

Output:

Infinity

isitapol2002

Follow

Improve

Article Tags :

• JavaScript
• Web Technologies
• JavaScript-Numbers
• JavaScript-Questions