This function will take two arguments, `string` and `num`.
*Note:* The exercises after this one will not have arguments provided as this one does - you will need to provide them yourself from now on. So read each exercise's README carefully to see what kinds of arguments will be expected.
You will notice in this exercise that there are multiple tests (see in file `repeatString.spec.js`). Only the first test is currently enabled. So after making sure that this first one passes, enable the others one by one by deleting the `.skip` from the `test.skip()` function.
- Create a variable to hold the string you're going to return, create a loop that repeats the given number of times and add the given string to the result on each loop.