It's floating point rounding errors - $L is just a smidgin under 3, but appears to be exactly 2 & 4 for 10**2 & 10**4.

our $K ||= 1e3;
our $L ||=log10( $K );

print $L-3; # -4.44089209850063e-16

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In reply to Re: My computer doesn't like the number 3? (Forget it! It's rounding!!!) by FunkyMonk
in thread My computer doesn't like the number 3? (Forget it! It's rounding!!!) by BrowserUk

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