in reply to My computer doesn't like the number 3? (Forget it! It's rounding!!!)

A little bit of light for those who didn't follow: 

sub log10{ log( $_[0] ) / log( 10 ) }

printf("%.16e\n", log10($_))
   for 1e2, 1e3, 1e4;

[download]
2.0000000000000000e+000
2.9999999999999996e+000
4.0000000000000000e+000

[download]

In Section Seekers of Perl Wisdom