Convert a string to an integer?

> defmodule GuessingGame do
> def hello do

>     IO.puts("Welcome to the number guessing game!!!")
>     IO.puts("--------------------------------------")
>     user_input = IO.gets ("What is your guess? ")
>     num = String.to_integer(user_input)

>     IO.puts("--------------------------------------")
>   random_num = Enum.random([1, 2, 3, 4, 5])
>   IO.puts("The random number was #{random_num} ")


>   cond do

>   random_num === num ->
>       "Correct Guess"
>   random_num != num ->
>         "Incorrect Guess"
> end
> end
> end

I am new to this. Not working yet. Am I close?