Hi
I am very new to perl and struggling with simple things...
I am trying to check if an input DNA sequence only contains nucleotides. And if it doesn't I want to print out the position in the sequence where an invalid character was entered.
This is as far as I have come:
#!/usr/bin/perl -w
$DNA = <STDIN>;
chomp ($DNA);
@DNA = split ("", $DNA);
$lengthseq = scalar @DNA;
print "The length of the sequence is:\n", $lengthseq, "\n";
@nucleotideDNA = "";
#check if each element in array is nucleotide
foreach $nucleotide (@DNA){
if ($nucleotide =~ /^[ATCG]+$/){
push @nucleotideDNA, $nucleotide;
}
else {
push @nonvalid, $nucleotide;
}
}
But how can I print the position of the non valid character?
Not sure if this makes any sense..
Thanks
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