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Showing content from https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Infinity below:

Infinity - JavaScript | MDN

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全局属性 Infinity 是一个数值，表示无穷大。

const maxNumber = Math.pow(10, 1000); // Max positive number

if (maxNumber === Infinity) {
  console.log("Let's call it Infinity!");
  // Expected output: "Let's call it Infinity!"
}

console.log(1 / maxNumber);
// Expected output: 0

与 Number.POSITIVE_INFINITY 的数值相同。

Infinity 是全局对象（global object）的一个属性，即它是一个全局变量。

Infinity 的初始值是 Number.POSITIVE_INFINITY。Infinity（正无穷大）大于任何值。

该值的意义与数学无穷大略有不同。有关详细信息，请参见 Number.POSITIVE_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 */

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