Exit a block prematurely

Daftar Isi

• last LABEL

• last

  The last command is like the break statement in C (as used inloops); it immediately exits the loop in question. If the LABEL isomitted, the command refers to the innermost enclosing loop. Thecontinue block, if any, is not executed:

   LINE: while (<STDIN>) {
   
   last LINE if /^$/;  # exit when done with header
   
   #...
   
   }
   

  last cannot be used to exit a block that returns a value such aseval {}, sub {}, or do {}, and should not be used to exita grep() or map() operation.

  Note that a block by itself is semantically identical to a loopthat executes once. Thus last can be used to effect an earlyexit out of such a block.

  See also continue for an illustration of how last, next, andredo work.