# What is a Number Object in JavaScript

In JavaScript, a Number is a built-in object representing numerical values, including integers and floating-point numbers. It also provides methods and properties for working with numbers.

### Syntax

``var val = new Number(number);``

If you pass the number argument as a non-number argument, then the argument cannot be converted into a number. Instead, it returns NaN (Not-a-Number).

### Example

``````let num = new Number(11)
console.log(num)

let data = new Number('Eleven')
console.log(data)``````

Output

``````[Number: 11]
[Number: NaN]``````

We passed the number and non-number arguments and saw the output.

## Javascript Number Properties

### Number.EPSILON

The Number.EPSILON property represents the difference between 1 and the smallest floating-point Number greater than 1.

You do not have to create the Number object to access this static property.

Example

``````let data = Math.abs(0.2 - 0.3 + 0.1);

console.log(data);
console.log(Number.EPSILON);

console.log(data < Number.EPSILON);``````

We have used the Javascript Math module. See the output.

``````2.7755575615628914e-17
2.220446049250313e-16
true``````

### Number.MAX_VALUE

The Number.MAX_VALUE property represents the maximum numeric value representable in JavaScript.

Let’s see the Number’s Max value.

``console.log(Number.MAX_VALUE);``

Output

``1.7976931348623157e+308``

Now, let’s check with other values.

``````function checkInfinity(a, b) {
if (a * b > Number.MAX_VALUE) {
return ("You Got Infinity Number");
}
return (a * b);
}

console.log(checkInfinity(1.7976931348623157e+308, 1))

console.log(checkInfinity(1.7976931348623157e+308, 2))``````

Output

``````1.7976931348623157e+308
You Got Infinity Number ``````

### Number.MIN_VALUE

The Number.MIN_VALUE property describes the smallest positive numeric value representable in JavaScript.

``console.log(Number.MIN_VALUE)``

Output

``5e-324``

See the following code.

``````function minimumCheck(a, b) {
if (a * b < Number.MIN_VALUE) {
return "Smallest Integer"
}
return (a * b);
}

console.log(minimumCheck(5e-324, 1))
console.log(minimumCheck(-1.7976931348623157e+308, 2))``````

Output

``````5e-324
Smallest Integer``````

### Number.NaN

The Number.NaN property represents Not-A-Number. The equivalent of Javascript NaN.

### Number.prototype

The Number.prototype property represents a prototype for a Number constructor.

### Number.MAX_SAFE_INTEGER

The Number.MAX_SAFE_INTEGER constant represents the maximum safe integer in JavaScript (`253 - 1`).

For larger integers, you can consider using BigInt.

Let’s see the value of the Number.MAX_SAFE_INTEGER.

``console.log(Number.MAX_SAFE_INTEGER)``

Output

``9007199254740991``

The MAX_SAFE_INTEGER constant has a value of 9007199254740991 (9,007,199,254,740,991 or ~9 quadrillions). The reasoning behind that Number is that JavaScript uses double-precision floating-point format numbers as specified in IEEE 754 and can only safely represent numbers between `-(253 - 1)` and `253 - 1`.

### Number.MIN_SAFE_INTEGER

The Number.MIN_SAFE_INTEGER constant represents the minimum safe integer in JavaScript (`-(253 - 1)`).
``console.log(Number.MIN_SAFE_INTEGER)``

Output

``-9007199254740991``

The MIN_SAFE_INTEGER constant has a value of –9007199254740991 (-9,007,199,254,740,991 or about -9 quadrillion). The reasoning behind that Number is that JavaScript uses double-precision floating-point format numbers as specified in IEEE 754 and can only safely represent numbers between `-(253 - 1)` and `253 - 1`.

## Javascript Number Methods

Method Description
isFinite() It checks whether the value is a finite number.
isInteger() It checks whether the value is an integer.
isNaN() It checks whether the value is a Number.NaN.
isSafeInteger() It checks whether the value is a safe integer.
toExponential(x) It converts the Number into an exponential notation.
toFixed(x) It formats the Number with x numbers of digits after a decimal point.
toLocaleString() It converts the Number into the string based on the locale settings.
toPrecision(x) It formats the Number to x length.
toString() It converts the Number to a string.
valueOf() It returns a primitive value of the Number.

That’s it for this tutorial.

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