-5＆gt;如何2 === -2？

发布于 2025-01-26 04:18:25 字数 757 浏览 3 评论 0 原文

在MDN文档中，下面有此示例在右移动运算符下。

const a = 5;          //  00000000000000000000000000000101
const b = 2;          //  00000000000000000000000000000010
const c = -5;         // -00000000000000000000000000000101

console.log(a >> b);  //  00000000000000000000000000000001
// expected output: 1

console.log(c >> b);  // -00000000000000000000000000000010
// expected output: -2

5＆gt;＆gt; 2 是有道理的，因为您将数字向右移动2个空间。在 -5＆gt;＆gt;的第二个示例中2 ，为什么即使它是＆gt;＆gt; 2 ？

MDN文档：

原文

In the MDN docs, there is this example below under right shift operator.

const a = 5;          //  00000000000000000000000000000101
const b = 2;          //  00000000000000000000000000000010
const c = -5;         // -00000000000000000000000000000101

console.log(a >> b);  //  00000000000000000000000000000001
// expected output: 1

console.log(c >> b);  // -00000000000000000000000000000010
// expected output: -2

5 >> 2 makes sense because you shift the digits right 2 spaces. In the second example of -5 >> 2, why does it only seemingly shift to the right one space even though it's >> 2?

MDN Docs: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Right_shift