Answer 1

to enter multiple inputs in the console you need to separate them with new line. in your case what you need to enter is:
0
5
(press 0, then ne line, then 5, then submit). try with something easy line input a input b print a print b

Answer 2

I'm not sure what you intend by downlimit. If you enter a value greater than 1, you don't get any output.

Try changing the line 's = 1' to 's = downlimit' and remove both instances of 'and s>=downlimit' (they are unnecessary) and it should run.

Don't forget to enter both values as @giuppichan said:
e.g.
type 55
hit 'enter'
type 5
hit 'submit'