Here's one way to do it, with help from the Number::Format module.
#!/usr/bin/env perl
use strict;
use warnings;
use Number::Format;
while(<DATA>) {
chomp $_;
my $x = new Number::Format;
my $formatted = $x->format_number($_, 1, 1);
$formatted = sprintf("%.2f", $formatted);
print "$_ -> $formatted\n";
}
exit;
__DATA__
1.24
13.25
2.90
2.99
2.92
14
Output:
1.24 -> 1.20
13.25 -> 13.30
2.90 -> 2.90
2.99 -> 3.00
2.92 -> 2.90
14 -> 14.00
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