You are not that far off

#!perl
use strict; # <--- add

open(my $fh, '<', 'Citytempfile.txt')
 or die "Cannot open Citytempfile.txt: $!";
#                     ^^^^ corrected

my $i = 0;
#        ^ missing ;

while (<$fh>) {
#my @array = split ' ', <$fh>
  my @array = split ' ', $_; # change
                      
  print $i+1, '. Temperature in ',$array[0], 
      ' is ', $array[1], 
      ' but average temp in ', $array[2], 
      ' is ', $array[3]," degrees.\n" ;
  $i++;
}

[download]

Take a look at using printf

poj

In reply to Re: read text file and generate an output file with information present in text file. by poj
in thread read text file and generate an output file with information present in text file. by Ganesh Bharadwaj1

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