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Use strict and warnings

by runrig (Abbot)
on Sep 08, 2001 at 04:09 UTC ( #111088=perltutorial: print w/replies, xml ) Need Help??

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  1. or download this
    use strict;
    
  2. or download this
    Global symbol "$xxx" requires explicit package name at ./tst line 5.
    
  3. or download this
    # Change this:
    $string = "hello world";
    ...
    while ($sth->fetch) {
     print "F1: $field1 F2: $field2\n";
    }
    
  4. or download this
    use warnings;
    
  5. or download this
    #!/usr/local/bin/perl -w
    
    ...
    $^W = 1;
    # Or
    BEGIN { $^W = 1 }
    
  6. or download this
    
    # Change this:
    ...
     local $^W;
     $_[0] + $_[1];
    }
    

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