Infinity - JavaScript | MDN

MDN Web Docs 2 min read

15 Aug '26, 22:48current

Summary (TL;DR)

Infinity is a global property in JavaScript representing positive infinity, a value greater than any other number. It behaves slightly differently from mathematical infinity, as detailed in Number.POSITIVE_INFINITY. Examples show operations like Infinity + 1, 10 ** 1000, and Math.log(0) yielding Infinity or -Infinity, while 1 / Infinity equals 0. The property is non-writable, non-enumerable, and non-configurable.

Try it

const maxNumber = 10 ** 1000; // Max positive number

if (maxNumber === Infinity) {
  console.log("Let's call it Infinity!");
  // Expected output: "Let's call it Infinity!"
}

console.log(1 / maxNumber);
// Expected output: 0

Value

The same number value as Number.POSITIVE_INFINITY.

Property attributes of `Infinity`
Writable	no
Enumerable	no
Configurable	no

Description

Infinity is a property of the global object. In other words, it is a variable in global scope.

The value Infinity (positive infinity) is greater than any other number.

This value behaves slightly differently than mathematical infinity; see Number.POSITIVE_INFINITY for details.

Examples

Using Infinity

console.log(Infinity); /* Infinity */
console.log(Infinity + 1); /* Infinity */
console.log(10 ** 1000); /* Infinity */
console.log(Math.log(0)); /* -Infinity */
console.log(1 / Infinity); /* 0 */
console.log(1 / 0); /* Infinity */