# Question 9

#1

I just started learning "return" and i don't understand the concept!

I don't know how to make two parenthesis, I am Just stuck
This is the question:
1.Write a function called perimeterBox that returns the perimeter of a rectangle.
2.It should have two parameters.One formula for perimeter is length + length + width + width;
3.Call the function and pass in any value for length and width you like.

This is where I am stuck

#2

First declare a two parameter as an argument in function inside the brackets anything you want and the double each values and sum up.
`var peremiterBox = function(width, height) { result = width*2 + height*2 return result};`

#3

Maybe this is useful for you if you are completely lost:

#4

Here's the function:

``````var perimeterBox = function(length, width){
return(length+length+width+width);
}``````

and how to call it:

``perimeterBox(10, 15); //Change the numbers to whatever you want.``

Parameters are the things in the brackets ().

See how much you can figure out from this. If you need more help, feel free to ask.

#5

Thank you, I now understand it.
I am also trying to understand when you have two variables, example:

Var timesTwo = function(number){
return number*2;

Var newNumber = timesTwo(15)
console.log (newNumber)
??