Re: PHP_FLOAT_MIN is positive

On 03/04/2019 12:27, Diogo Neves wrote: > It really don't make much sense: > > <?php > > var_dump( PHP_FLOAT_MIN < 0 ); > var_dump( PHP_INT_MIN < 0 ); > > On Wed, Apr 3, 2019 at 10:52 AM Benjamin Morel <benjamin.morel@gmail.com> > wrote: > >> Hi internals, >> >> I just used PHP_FLOAT_MIN for the first time, and was surprised that it is >> the smallest **positive** number representable. Is this expected? >> >> This is unlike PHP_INT_MIN, which is the absolute smallest representable >> integer, and as such is negative: >> >> echo PHP_INT_MIN; // -9223372036854775808 >> echo PHP_FLOAT_MIN; // 2.2250738585072E-308 >> >> If it is intended, maybe the doc >> >> <https://www.php.net/manual/en/reserved.constants.php> should >> be clear >> about this, at the moment it is just: >> >> Smallest representable floating point number. >> >> >> Which is confusing IMO. FLT_MIN is the smallest real near 0. Are you looking for -FLT_MAX? With IEEE754 floats, there are positive and negative zeros, so the range above and below 0 is the same. -- Regards, Mike

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