From the Perldoc

loop
   A construct that performs something repeatedly, like a roller coaster.

loop control statement
   Any statement within the body of a loop that can make a loop prematurely stop looping or skip an “iteration”. Generally you shouldn’t try this on roller coasters.

loop label
   A kind of key or name attached to a loop (or roller coaster) so that loop control statements can talk about which loop they want to control.

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