The output was the intuitive ("nice") version

Did you look at the intermediate values ? (That's what your original complainants were doing.)

C:\_32\pscrpt>perl -le "print $];"
5.024000

C:\_32\pscrpt>perl -V:archname
archname='MSWin32-x86-multi-thread-64int';

C:\_32\pscrpt>perl -V:nvtype
nvtype='double';

C:\_32\pscrpt>type try.pl
use warnings;
use strict;

my $x = 0;
for( 1..100 ) {
    $x += 0.01;
    print "$x\n" if length $x > 4;
}

C:\_32\pscrpt>perl try.pl
0.810000000000001
0.820000000000001
0.830000000000001
0.840000000000001
0.850000000000001
0.860000000000001
0.870000000000001
0.880000000000001
0.890000000000001
0.900000000000001
0.910000000000001
0.920000000000001
0.930000000000001
0.940000000000001
0.950000000000001
0.960000000000001
0.970000000000001
0.980000000000001
0.990000000000001

C:\_32\pscrpt>
[download]

Those are actually correct values (rounded to 15 decimal digits of precision) for a perl whose nvtype is an 8-byte double.

And it's also to be expected (given perl's current practice) that the next (and last) value to be calculated is printed as "1" - because 1.0000000000000007 rounded to 15 decimal digits of precision is exactly that.

Cheers,
Rob

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