Performing an Addition with the + Operator
String concatenation is covered in more detail in Chapter 3.
You want to add some numbers together.
console.log(2 + 1);
var myNum = 14;
var anotherNum = 22;
console.log(anotherNum + myNum);
console.log(myNum + 0.23);
console.log(anotherNum + 16 + myNum + 14);
console.log('45' + '3'); // the two Strings are concatenated, ...