Number.MAX_VALUE - JavaScript 编辑

The Number.MAX_VALUE property represents the maximum numeric value representable in JavaScript.

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

Property attributes of Number.MAX_VALUE
Writable	no
Enumerable	no
Configurable	no

Description

The MAX_VALUE property has a value of approximately 1.79E+308, or 2¹⁰²⁴. Values larger than MAX_VALUE are represented as Infinity.

Because MAX_VALUE is a static property of Number, you always use it as Number.MAX_VALUE, rather than as a property of a Number object you created.

Examples

Using MAX_VALUE

The following code multiplies two numeric values. If the result is less than or equal to MAX_VALUE, the func1 function is called; otherwise, the func2 function is called.

if (num1 * num2 <= Number.MAX_VALUE) {
  func1();
} else {
  func2();
}

Specifications

Specification
ECMAScript (ECMA-262) The definition of 'Number.MAX_VALUE' in that specification.

Browser compatibility

BCD tables only load in the browser

See also

• Number.MIN_VALUE
• The Number object it belongs to