So I'm working on a script that will accept arguments that are text files, and should output the total number of lines in those files. 
For example, if I say

```
./myScript file1 file2 file3

```

it will print

```
10 total

```

(let us assume that the sum of all the lines from those three files is 10).

I know how to go over all the arguments. 
I also know that, to get the number of lines in a file, I would say:

```
wc -l < fileName

```

However, how can I make that into an "int" that I can add to some sort of cumulative sum?