Hey guys

I'm just doing exercise 9 Functions with two parameters in introduction to functions in JS. I can get passed this exercise but I wanted to try and get the values for both parameters by prompts.

My function is to produce the perimeter by acquiring the length and width by prompt. The function currently is adding the numbers like 5 + 7 = 57, opposed to 12.

For example, if I want the perimeter and I put my length as 5 and width as 7, the perimeter would come out as 114 because 57 * 2 = 114, opposed to 12 * 2 = 24

Can anyone show me the correct code? Cheers in advance

```
var perimeterBox = function (length, width) {
return 2 * (length + width);
};
var askLength = prompt ("What is the length?");
var askWidth = prompt ("What is the width?");
perimeterBox (askLength, askWidth);
```