Question

我有一个Javascript变量var test="hello"我想添加前缀＆＃34; world＆＃34;到函数中的变量字符串，以便test =＆＃34; worldhello＆＃34;。如何在JavaScript代码中编写该命令？

Answer 1

字符串连接： test = "world"+test

Answer 2

var test = "hello";
var newStr = "world" + test;

Answer 3

var test = "hello";
test = test + " world";

或

var world = " world";
var test = "hello" + world;

Answer 4

var var2 = "world";
test = "hello "+var2;

在函数中

function concatenate(str,con){ 
        return str.toString()+con.toString(); //toString() for prevent an int or float sum
 }
var x = concatenate('hello ','world'); //hello world
var y = concatenate(x,"!!!"); //hello world!!!

如何将字符串附加到Javascript变量

4 个答案: