Please consider using a regular expression to perform the validation as it is much simpler to code and faster to execute:

use feature ":5.14";
use warnings FATAL => qw(all);
use strict;
use Data::Dump qw(dump);

say (/\Aa*\Z/ ? "$_ is all a's" : "$_ is not all a's") for qw(aaaa aaa
+ab aaac cccccbbb cccca);

[download]

Produces:

aaaa is all a's
aaaab is not all a's
aaac is not all a's
cccccbbb is not all a's
cccca is not all a's

In reply to Re: my script is not giving the result using last function by philiprbrenan
in thread my script is not giving the result using last function by ulaksh

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