Javascript - Number Number Range

  1. HOME
  2. Javascript
  3. Number
  4. Number Range

Introduction

The smallest number that can be represented in ECMAScript is stored in Number.MIN_VALUE and is 5e-324.

The largest number is stored in Number.MAX_VALUE and is 1.7976931348623157e+308 on most browsers.

If a calculation results in a number that cannot be represented by JavaScript's numeric range, the number automatically gets the special value of Infinity.

Any negative number that can't be represented is -Infinity (negative infinity), and any positive number that can't be represented is simply Infinity (positive infinity).

The value of positive or negative Infinity cannot be used in any further calculations.

To determine if a value is finite, there is the isFinite() function.

This function returns true only if the argument is between the minimum and the maximum values: 

var result = Number.MAX_VALUE + Number.MAX_VALUE; 
console.log(isFinite(result));    //false

To get the values of positive and negative Infinity, use Number.NEGATIVE_INFINITY and Number.POSITIVE_INFINITY.