函数返回两个值

Question

我想问一下这个功能的效果如何,以及是否有任何可以使用它的情况.谢谢你的回答.

function sum_and_dif(a, b) {
    var c = a + b;
    var d = a - b;
    return c +" " + d;
}

var result = sum_and_dif (200, 10);

document.write(result +"</br>");

var where_is_a = result.indexOf(" ");// Here i detected where is the empty space
var c_number = parseInt(result.substring(0, where_is_a));
var d_number = parseInt(result.substring(where_is_a +1,result.length));

document.write(c_number +"</br>");
document.write(d_number +"</br>");

Answer 1

将对象用作返回值而不是字符串可能更有用.

return { sum: c, diff: d };

这样,您可以通过键入result.sum或轻松地使用它result.diff.