Javascript 中字符串和变量之间的空格

Question

How can I make this return "Hello yourName" as opposed to "HelloyourName"?

    var yourName=(prompt("What's your name?"));
    alert("Hello" + yourName);       
    

Answer 1

alert("Hello " + yourName.trim());    
alert("Hello" + " " + yourName.trim());    

I don't see why you cannot add a space between. yourName.trim() is to make sure you won't introduce unexpected spaces by yourname .

Answer 2

Add a space character to the string.

This:

"Hello" + yourName

would resolve to this:

HelloJesse

whereas this:

"Hello " + yourName
   // ^--- added a space

would resolve to this:

Hello Jesse

Answer 3

var yourName=(prompt("What's your name?"));
alert("Hello " + yourName); // "Hello " with space  

Answer 4

You can concatenate a space in between the variables, like so:

var fullName = firstName + ' ' + lastName;