How does someone exit from a sub routine without exitting altogether?

Using return. 

sub doit {
   ...
   if (nothing_else_to_do) {
      return;
   }
   ...
}

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If you want to exit with a catchable error, you can use die or croak. 

sub doit {
   ...
   if (did_not_provide_gizmo) {
      die("Gizmo required");
   }
   ...
}

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I know with arrays you can do LAST to stop the iterations.

last (and next and redo) affect loops, not arrays. Specifically,

while (and until) loops: 

while (...) {
   ...
   last;
   ...
}

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C-style for loops, foreach loops and counting loops: 

for (...) {
   ...
   last;
   ...
}

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Bare loops: 

{
   ...
   last;
   ...
}

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In reply to Re: How to exit out of a sub routine by ikegami
in thread How to exit out of a sub routine by Anonymous Monk

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