the programme is not responding in other exercises, how can I go around this?

Answer 1

You are probably confused by the difference between single line exercises and multiline exercises.

In the single line exercises, you have a prompt for the particular language you are working with with and when you press the enter/return key it runs the text you typed.

In the multiline exercises, you have a blank text box and no prompt.  You type in your code and edit it how you want, then run it by clicking on the "Run Your Code" button.

Hope that helps.

If the problem is something different than this (what I described above is confusing some people), then please send email to code@he.net describing which exercise you are having trouble with, and what OS and web browser you are using.