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Update number.md #270

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2 changes: 1 addition & 1 deletion docs/types/number.md
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Expand Up @@ -43,7 +43,7 @@ JavaScript 内部，所有数字都是以64位浮点数形式储存，即使整

上面公式是正常情况下（指数部分在0到2047之间），一个数在 JavaScript 内部实际的表示形式。

精度最多只能到53个二进制位，这意味着，绝对值小于2的53次方的整数，即-2<sup>53</sup>到2<sup>53</sup>，都可以精确表示。
精度最多只能到53个二进制位，这意味着，绝对值小于2的53次方的整数，即-2<sup>53</sup> - 1到2<sup>53</sup> - 1，都可以精确表示。

```javascript
Math.pow(2, 53)
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