我试图弄清为什么var catAge不被视为数字(因为它不是字符串?)并且它们连接并返回52而不是7?我是一个初学者,我们将不胜感激!
var petage = 5;
var catAge = prompt("How old is your cat?");
// Won't work as expected
alert(catAge + 2);
// Works as expected
alert(parseInt(catAge) + 2);