Hello,

I have this code: 

#!c:\perl\bin\perl.exe

use strict;
use warnings FATAL => 'all';
use Fcntl qw[:flock];

my $impressions = 0;
my $FH = 'C:\\scripts\\20040120\\mr\\imp\\';

chdir $FH or die "$!";

while (glob '*Jan2004*.txt') {
    open FH, $_ or die $!;
    flock FH, LOCK_SH or die $!;
    while (<FH> ) {
        chomp;
        if ( /Impressions:/ ) {
        my($text, $value) = split(/:/, $_);
        print "Impressions: $value";
        print "\n"
        #$impressions += $value;
     }
    }
    close FH or die $!;
  }

print 'Total impressions: ', $impressions or die $!;<br>

[download]
This code opens file and retrieves a value assigned to 'Impressions:' I would like to caunt all values. The output so far looks like this: 
C:\scripts\20040120\mr>perl c07_impressions_i.pl
Impressions:                    85
Impressions:                    19298
Impressions:                    n/a
Impressions:                    25082
Impressions:                    8314
Impressions:                    8663
Impressions:                    8672
Impressions:                    8078
Impressions:                    n/a
Impressions:                    26167
Impressions:                    7708
Impressions:                    8247
Impressions:                    14070
Impressions:                    9641
Impressions:                    n/a
Total impressions: 0
C:\scripts\20040120\mr>

[download]
Because there are 'n/a' I cant count the impressions together. How should I change the script so it will replace any occurence of 'n/a' with 0 (zero)?

Thank you for your time.
danield

update (broquaint): tidied up formatting

In reply to How to substitute 0 (zero) Instead of 'n/a' by danield

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