Why isn't this code working at the playground?

Question

https://code.sololearn.com/cWnksCESpj9F/?ref=app

Answer 1

If you print num, you can see it is NA. What were you trying to do with readLines?

Answer 2

There is an R course now.

Answer 3

Where i got it, it reads a number.

Answer 4

Which number? Do you have a file or are you trying to get user input (from console)?

For R, user input is currently not supported on sololearn playground.

Answer 5

Seems to work now :)

Answer 6

It is a code coach. I only made the last four lines.

Answer 7

I didn't know there was code coach for R...
(could you link it please?)