How to extract elements after for loop gets over in Perl code.

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PERL

use strict;
use warnings; # syntax is use ???
use feature qw( say );

my @aa = ("A", "C", "D", "E", "F", "G", "H", "I", "K", "L", "M", "N", "P", "Q", "R", "S", "T", "V", "W", "Y");

my $pair;
for my $n1 (@aa) {
   for my $n2 (@aa) {
     $pair = $n1 . $n2;    
        	   
   }
}
my $k1=split("' '", $pair);
print $k1;

What I have tried:

# these are the 20 amino acids and i have to make 400 possible combination of two
# amino acid(di amino acid) like this: AA AC AD ...... CA CC CD CE CF CG.....YA.....YY
# the scope of "for" loop diminishes # when it ends.why it is ending there only since i made the variable $pair as global #only two Y's as output

Posted 6-Jul-17 23:12pm

Member 13298024

Updated 7-Jul-17 0:03am

KarstenK

v3

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KarstenK · Answer 1 · 2017-07-07T00:03:00

Solution 1

this assigment overwrites any older assigments:

PERL

$pair = $n1 . $n2;

possible solution could look like this:

PERL

my $pair = ""; #init as empty string

# in the loop: append result string on the previous reuslt and append white space 
$pair .=  $n1 . $n2 . " ";

Posted 7-Jul-17 0:03am

KarstenK