A string is a variable that contains text

var email = "www.digitalworkshop.com"

Text in a variable must be surrounded by quote marks, you can use either single (‘hello’) or double ("goodbye") quote marks. Text surrounded by quote marks is treated as a string and not as a line of code, for example

var welcome = "Hello " + UserName + "welcome to Opus"

In the example above, UserName is the name of another variable and not a string – if the value of that variable was John, then the variable welcome would contain the following value

Hello John welcome to Opus