Question: Here is my Perl code

```
use POSIX;

my @arr = split(/\\n\\n/, $content);

my $len = length @arr;

$len = $len / 2;

my $b = round($len) - 1;

```

At the top of my script I have `use POSIX`. I once had `use Math::Round` but that didn't work.

I'm trying to use the `round` function but the page keeps breaking when I call it.

Answer: 
You are not calling `changeToFahrenheit()` method from `main()` method, so it will do nothing and exit
* As the method is static method you could call the method with out creating an object.
* reader.nextInt(); // This returns integer .. so store it in integer.
* you don't have to return value unless you have other methods which reuses this value returned.