The global property Infinity is a numeric value representing infinity.

Property attributes of Infinity
Writable no
Enumerable no
Configurable no


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

The initial value of Infinity is Number.POSITIVE_INFINITY. 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.

As defined by the ECMAScript 5 specification, Infinity is read-only (implemented in JavaScript 1.8.5 / Firefox 4).


Using Infinity

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


ECMAScript Language Specification (ECMAScript)
# sec-value-properties-of-the-global-object-infinity

Browser compatibility

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See also