Stop a for, do loop

[MarcoFontana]

Hi all,

is there a way to stop a for, do loop before its natural end?
I should take control over the loop, but I've no way to do it because I can't press any button while that loop is running...
I would do a loop "until" button pressed, for example, but I don't know how and overall if it's a possible thing to do.

Thanks a lot
Marco

[startup]

use "break"

[MarcoFontana]

Do you say to use "break" in a button? But I can't press any button until the loop has ended! How can I use break this way? I don't know when the user interaction happens.