How can I programmatically close all other applications from my iPhone application?

Question

Is it possible to programmatically close all running applications on the iPhone except my own from within my own application? If so, how?

Answer 1

No. All apps run in a sandbox so that you can't communicate between them. And even if you technically could it would be considered bad practice.

Why do you need to close other apps? I can't think of any valid use case where that would be necessary.