in reply to creating new files bases on string size

Something like this?
use Modern::Perl;

my @filehandle;
my $maxlength = 10;
for ( 1 .. $maxlength  ) {
    open $filehandle[$_], '>', "text$_.txt" or die "Could not open tex
+t$_.txt";
}

while (<DATA>) {
    chomp;
    select $filehandle[ length($_) ];
    say $_;
}

__DATA__
ABC
DEFG
HIJ
KL
1234XYZ
G
HI
S
12ER
34TY

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CountZero

A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James

In Section Seekers of Perl Wisdom