4.7. Notes on Lexical (my) Variables Those lexical va...
  4.8. The use strict Pragma Perl tends to be a permiss...
  4.9. The return Operator The return operator immediat...
  4.10. Non-Scalar Return Values A scalar isn't the...
  5.1. Input from Standard Input Reading from the stand...
  5.3. The Invocation Arguments Technically, the diamon...
  5.2. Input from the Diamond Operator Another way to r...
  5.5. Formatted Output with printf You may wish to hav...
  5.4. Output to Standard Output The print operator tak...
5.7. Opening a Filehandle You've seen that Perl prov...