Question: ```
pt=new Date(2019,11,12,8,2,3)

console.log(pt.getFullYear()," ",pt.getMonth());

```

gives result `2019 " " 11`

```
console.log(pt.getFullYear()+" "+pt.getMonth());

```

gives the result as `2019 11`

What is the difference between using, and + in this example?

Answer: 
The first of these gives three separate arguments to console.log, while the second appends the three together, then passes that as a single argument to console.log.
With the (,) you're with the console.log you're requesting to show a separate group of items as string, making a kind of array. When you put the (+) symbol you are adding the strings, and in this case the " " is just adding a space between the first and the second string. It is called concatenation.