How to create a Number object using JavaScript?

In this article, we’ll learn how to create a Number object in JavaScript. It helps us work with numbers like 20 or 0.25 using the built-in Number object.

Usually, we don't need to create number objects ourselves. The Number() function is used to convert different values into numbers. Also, regular numbers like integers are primitive values and don’t have built-in methods.

Syntax:

let n = new Number(val);

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

Return Value: The Number() function in JavaScript tries to convert any value into a number. If it can’t, it returns NaN, which means “Not a Number.” Even though numbers are primitive values, JavaScript can treat them like objects when needed.

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 smallest positive value a JavaScript number can have 5e-324.
• Number.NAN: It returns NaN (Not a Number).
• 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.

Example 1: Maximum possible value

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

Output:

1.7976931348623157e+308

Example 2: Smallest possible value

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

Output:

5e-324

Example 3: Not a Number (NaN)

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

Output:

NaN

Example 4: Negative Infinity

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

Output:

-Infinity

Example 5: Positive Infinity

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

Output:

Infinity