Question

我很想知道如何从阵列中获取警报按摩撑条元素编号（巴西是6），而不是放置国家名称。我已经尝试了几种方法，但它没有用。

HTML：

<body>
    <div></div>

</body>

Javascript：

var cleanCities = ["Argentina" , "Brazil", "Canada ", "Denmark"];
var visit = prompt("What is your city?");
var numLength = cleanCities.length;
var matchFound = false;

for (i=0; i<numLength ; i++) 
    if (visit === cleanCities[i]){

        matchFound = true;
        alert ("It is really a nice City")
        break;

    }

    if (matchFound === false){
        alert ("It is not in the List");
    }

Answer 1

首先，清理你的牙箍和标签：

var cleanCities = ["Argentina" , "Brazil", "Canada ", "Denmark"];
var visit = prompt("What is your city?");
var numLength = cleanCities.length;
var matchFound = false;

for (i=0; i<numLength ; i++) {
    if (visit === cleanCities[i]) {
        matchFound = true;
        alert ("It is really a nice City")
        break;
    }
}

if (matchFound === false){
    alert ("It is not in the List");
}

获取字符串的长度：

"Brazil".length

输出：6

与数组元素的Javascript锻炼错误

1 个答案: