在此页

• 句法
• 描述
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

toString() method returns a string representing the specified BigInt object. The trailing "n" is not part of the string.

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.

句法

bigIntObj.toString([radix])
					

参数

radix 可选

Optional. An integer in the range 2 through 36 specifying the base to use for representing numeric values.

返回值

A string representing the specified BigInt 对象。

异常

RangeError

若 toString() is given a radix less than 2 or greater than 36, a RangeError is thrown.

描述

BigInt object overrides the toString() 方法在 Object object; it does not inherit Object.prototype.toString() . For BigInt objects, the toString() method returns a string representation of the object in the specified radix.

toString() method parses its first argument, and attempts to return a string representation in the specified radix (base). For radixes above 10, the letters of the alphabet indicate numerals greater than 9. For example, for hexadecimal numbers (base 16) a through f are used.

若 radix is not specified, the preferred radix is assumed to be 10.

若 bigIntObj is negative, the sign is preserved. This is the case even if the radix is 2; the string returned is the positive binary representation of the bigIntObj preceded by a - sign, not the two's complement of the bigIntObj .

范例

使用 toString

17n.toString();      // '17'
66n.toString(2);     // '1000010'
254n.toString(16);   // 'fe'
-10n.toString(2);    // -1010'
-0xffn.toString(2);  // '-11111111'
					

Negative-zero BigInt

There is no negative-zero BigInt as there are no negative zeros in integers. -0.0 is an IEEE floating-point concept that only appears in the JavaScript Number 类型。

(-0n).toString();      // '0'
BigInt(-0).toString(); // '0'
					

规范

规范
ECMAScript (ECMA-262) The definition of 'BigInt.prototype.toString()' in that specification.

浏览器兼容性

The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

更新 GitHub 上的兼容性数据

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet	Node.js
toString	Chrome 67	Edge 79	Firefox 68	IE No	Opera 54	Safari No	WebView Android 67	Chrome Android 67	Firefox Android 68	Opera Android 48	Safari iOS No	Samsung Internet Android 9.0	nodejs 10.4.0

图例

完整支持

完整支持

不支持

不支持

另请参阅

• BigInt.prototype.toLocaleString()
• BigInt.prototype.valueOf()
• Number.prototype.toString()

元数据

• 最后修改： Jan 13, 2020

相关话题

1. 标准内置对象
2. BigInt
3. 方法
   1. BigInt.asIntN()
   2. BigInt.asUintN()
   3. BigInt.prototype.toLocaleString()
   4. BigInt.prototype.toString()
   5. BigInt.prototype.valueOf()
4. 继承：
5. Function
6. 特性
   1. Function.arguments
   2. Function.caller
   3. Function.displayName
   4. Function.length
   5. Function.name
7. 方法
   1. Function.prototype.apply()
   2. Function.prototype.bind()
   3. Function.prototype.call()
   4. Function.prototype.toSource()
   5. Function.prototype.toString()
8. Object
9. 特性
   1. Object.prototype.__proto__
   2. Object.prototype.constructor
10. 方法
    1. Object.prototype.__defineGetter__()
    2. Object.prototype.__defineSetter__()
    3. Object.prototype.__lookupGetter__()
    4. Object.prototype.__lookupSetter__()
    5. Object.prototype.hasOwnProperty()
    6. Object.prototype.isPrototypeOf()
    7. Object.prototype.propertyIsEnumerable()
    8. Object.prototype.toLocaleString()
    9. Object.prototype.toSource()
    10. Object.prototype.toString()
    11. Object.prototype.valueOf()
    12. Object.setPrototypeOf()