I tried it with 1/3: 
#! /usr/bin/perl
use warnings;
use strict;
use feature qw{ say };

sub amnt {
    my ($amount) = @_;
    say "$amount I'm checking amount before padding";

    my $padamnt = sprintf("%016d",$amount);
    say "$padamnt I'm checking amount after padding";
}

amnt(1/3);

[download]

As expected, before padding its 0.333333333333333, after padding it's 0000000000000000. Rounding.

Now try it with 1.999999999999999. print doesn't output the precise value. 

2 I'm checking amount before padding
0000000000000001 I'm checking amount after padding

[download]

map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

In reply to Re: Padding with sprintf changing number by choroba
in thread Padding with sprintf changing number by sachin raj aryan

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