Hello

This is code that i had written to find the occurance of a word eg:ACGT from a file but in the output $count returning '0' only. where is the mistake in the code and why is it returning '0' in the output.

#!/usr/bin/perl -w

print "Please type the filename of the Chromosome: ";

$chromosomefilename = <STDIN>;

chomp $chromosomefilename;

unless ( open(CHROMOSOMEFILE, $chromosomefilename) ) {

print "Cannot open file \"$chromosomefilename\"\n\n";

exit;

}

@chromosome = <CHROMOSOMEFILE>;

close CHROMOSOMEFILE;

$chromosome = join( '', @chromosome);

$chromosome =~ s/\s//g;

do {

print "Enter the Recognition Sequence to search for: ";

$recognitionsequence = <STDIN>;

chomp $recognitionsequence;

my @words = qw ($chromosomefilename);

my $count = grep /$recognitionsequence/, @words;

print "\$count = $count\n";

} until ( $recognitionsequence =~ /^\s*$/ );

exit;

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In reply to Count the occurance of a words in a string by Pratyusha Reddy

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