Returning Back to some Previous Loop if a separate condition is met

What is the most efficient way for me to accomplish the following:

I want to loop some function while a condition is true.

while (something is true)
    do this
end

Once that something is no longer true, essentially what I want to do is find a way to go back to that "while loop" if a separate condition is met. For instance:

while (something is true)
    do this
end

input()

if (if that input is a certain value)
   GO BACK to the previous loop
end

Is there any way to get 'back' to the other loop? Essentially I wan't to ask "are you sure you want to stop doing that while loop?" and if not, go back to the while loop again.

Thanks

Answer 1

[Walter Roberson]

Nope, no way of doing that. So don't. Instead,

while true
  while (something is true)
    do this
  end
  yesno = input()
  if yesno ~= the certain value
    break;
  end
end