Javascript Learn Infinity Property Basics|number ifFinite method example

Infinity Property in javascript

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

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



Javascript Infinity Example Usage

The number value is divided by Zero. and the 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 in javascript

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

var value = 45;  
if (45< Infinity>)
console.log('Value is less than the infinite value')

output is

Value is less than the 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 an infinite number.



Example Following is an To check Given number is finite or infinite using isFinite() method.

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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