what is a string

A string is a data type is javascript, data types including :

• Strings ( Strings are written with quotes. You can use single or double quotes )

   "hello world"

• Numbers

   10

• Booleans ( Boolean is a value its either true or false )

   var x = 10;
   var y = 5;
   x > y // returns true

   var x = 1
   var y = 4;
   x > y // returns false

• Arrays ( Think of an array like a list of items, arrays are written with square brackets )

   var names = ["Wesam", "John", "Nahla"];

• Objects ( Think of objects like a collection of properties objects are written with curly braces )

   var user = {
      name: "stuve",
      age: 25,
      country: "sweden"
   }

• Undefined ( a variable without a value, has the value undefined )

   var score; // returns undefined

• Null

   Null is the absence of value ( the data type of null in javascript is an object )

You can know the type of anything by using the typeof operator

typeof 5; // returns a number
typeof "hello" // returns a string
typeof ["Wesam", "John", "Nahla"] // returns object despite it's an array javascript arrays are objects

hello

I'm not very familiar with JavaScript, and I don't know if this will help. But the following passed the Challenge:

var myName = "Oskar Lundberg"

var myAge = 20

var message = myName + " is " + myAge

alert(message)

I hope it somehow helps :D