String operators

Javascript String operators

If you’d like to add two strings together, or concatenate them, you use the same + operator that you use for numbers:

var complete = "com" + "plete";

The value of complete will now be "complete".Again, you can use a combination of strings and string variables with the + operator:

var name = "Slim Shady";
var sentence = "Your name is " + name;

The value of sentence will be "Your name is Slim Shady". You can use the += operator with strings, but not the ++ operator—it doesn’t make sense to increment strings. So the previous set of statements could be rewritten as:

var name = "Slim Shady";
var sentence = "Your name is ";
sentence += name;

If you try to add a number to a string, JavaScript will automatically convert the number into a string, then concatenate the two resulting strings:

var sentence = "I am " + 1977
sentence now contains " I am 1977".