[`arguments`](https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Functions/arguments) **`arguments`** 是一个对应于传递给函数的参数的类数组对象。 ``` function func1(a, b, c) { console.log(arguments[0]); // expected output: 1 console.log(arguments[1]); // expected output: 2 console.log(arguments[2]); // expected output: 3 } func1(1, 2, 3); ```