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Showing content from http://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Operators/Greater_than below:

大于(>) - JavaScript | MDN

大于(>)

Baseline Widely available

大于运算符(>)在左操作数大于右操作数时返回 true,否则返回 false。

尝试一下
console.log(5 > 3);
// Expected output: true

console.log(3 > 3);
// Expected output: false

// Compare bigint to number
console.log(3n > 5);
// Expected output: false

console.log("ab" > "aa");
// Expected output: true
语法 描述

操作数比较使用与小于运算符相同的算法,只是两个操作数交换了。

示例 字符串与字符串比较
console.log("a" > "b"); // false
console.log("a" > "a"); // false
console.log("a" > "3"); // true
字符串与数值比较
console.log("5" > 3); // true
console.log("3" > 3); // false
console.log("3" > 5); // false

console.log("hello" > 5); // false
console.log(5 > "hello"); // false

console.log("5" > 3n); // true
console.log("3" > 5n); // false
数值与数值比较
console.log(5 > 3); // true
console.log(3 > 3); // false
console.log(3 > 5); // false
数值与大整型比较
console.log(5n > 3); // true
console.log(3 > 5n); // false
比较 Boolean、null、undefined 和 NaN
console.log(true > false); // true
console.log(false > true); // false

console.log(true > 0); // true
console.log(true > 1); // false

console.log(null > 0); // false
console.log(1 > null); // true

console.log(undefined > 3); // false
console.log(3 > undefined); // false

console.log(3 > NaN); // false
console.log(NaN > 3); // false
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