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Detailed interpretation of the code, string concatenation in Javascript

亚连Original: 2018-05-17 17:43:451998browse

The following is the String connection in Javascript that I compiled for you. Interested students can take a look.

<pre name="code" class="javascript"><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">  
<html>  
<head>  
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">  
<title>Insert title here</title>  
<script type="text/javascript">  
/*1．concat函数，将两个或者多个字符串连接成一个字符串  
    首先看一下concat的语法  
    variable.concat("string1","string2","string3","string4");  
*/  
    var str1 = "aa"  
    var str2 = "bb"  
    var str3 = "cc"  
    var str = str1.concat(str2,str3);  
    alert(str);  
//或  
    str = "";  
    str = str.concat(str1,str2,str3);  
    alert(str);  
//或  
    str = "";  
    str = str.concat("aa","bb","cc");  
    alert(str);  
/*2. 通过加号（+）直接对字符串进行连接  
*/  
    str = str1+str2+str3;  
    alert(str);  
//或 声明一个变量来进行连接  
    str = "";  
    str += "hello";  
    str += "world";  
    document.write(str);  
/*3. 将字符串存入数组，然后调用join方法．  
将数组中的每个元素连接起来返回一个字符串.参数就是连接符.(默认连接符是",")  
使用该方法可以模拟一个StringBuilder  
*/  
    var sArr = ["long"," time"," no"," see"];  
    alert(sArr.join(""));  
</script>  
</head>  
<body>  
</body>  
</html>

The above is the string connection in Javascript that I compiled for everyone. I hope it will be helpful to everyone in the future.

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