May I ask what automation challenge you're trying to solve by using an infinite loop? Typically they are intentionally avoided and can often cause a computer crash.
No, a Loop step set to execute zero times will not achieve this. In fact it will simply not execute its containing steps at all. It will, however, accept a number as high as 999,999,999.
The only way to achieve this through Test Studio is with a loop in a coded step deliberately set to never exit.
All the best,
the Telerik team