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- $x = 8 - 6.4; // равно 1.6
- $y = 1.6;
- var_dump($x); // вернёт 1.6
- var_dump($y); // вернёт 1.6
- var_dump($x === $y); // FALSE!!!
- var_dump(round($x,2) == round($y,2)); // TRUE, после округления
- 1.60000000 <= $x
- 1.59999999 <= $y
- echo number_format( $x, 20, ".", "" ); echo "n";
- echo number_format( $y, 20, ".", "" ); echo "n";
- 1.59999999999999964473
- 1.60000000000000008882
- echo var_export($x); echo "n"; // 1.5999999999999996447286321199499070644378662109375
- echo var_export($y); echo "n"; // 1.600000000000000088817841970012523233890533447265625
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