# Javascript Learn Infinity Property Basics

### Infinity Property

Infinity is a property of a Global Object, that specifies positive values of a numeric data. The default value of infinity is Number.POSITIVE_INFINITY.

It represents Mathematical Infinity value. In mathematical calculations, Any value is divided by Zero is returned infinity

#### Syntax

``````Infinity

``````

#### Example Usage

The number value is divided by Zero. and Infinity value is always the largest value of any numeric value When you are adding/multiply any value with infinity will get Infinity

``````console.log(123/0) // Infinity
console.log(Infinity) // Infinity
console.log(Infinity - Infinity) // NaN
console.log(Infinity+Infinity) // Infinity
console.log(Infinity*Infinity) // Infinity

``````

Infinity value is represented in Positive and Negative Number.POSITIVE_INFINITY - Represents Positive infinite values - Infinity Number.NEGATIVE_INFINITY - Represents Negative Infinite value - -Infinity Infinity property usages

1. This will be used to check arithmetic operations result in comparison with Infinity.
2. This will also be used to store the infinite value of any calculations
3. Checking infinite value for Division

#### Check and Compare Infinity value

Infinity can be used like a variable in conditional if the expression

``````var value = 45;
if (45
``````

output is

``````Value is less than infinite value
``````

#### Number isFinite() method

isFinite() is defined in Number Object. isFinite() method checks value for a finite number, return true for a finite number, false for infinite number Syntax

``````Number.isFinite(numericvalule)

``````

Example Following is an example of isFinite() method of usage.

``````console.log(Number.isFinite(123)) // true
console.log(Number.isFinite(Infinity)) //false
console.log(Number.isFinite(null)) //false
console.log(Number.isFinite(NaN)) //false
console.log(Number.isFinite(-Infinity)) //false
console.log(Number.isFinite(undefined)) //false

``````
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