3v4l.org

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<?php $a = 0.2; $b = 0.7; $c = $a + $b; $d = 0.9; var_dump($c); var_dump($c === $d); var_dump(round($c, 1)); var_dump(round($c, 1) === $d);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
float(0.8999999999999999) bool(false) float(0.9) bool(true)
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
float(0.9) bool(false) float(0.9) bool(true)
preferences:
226.9 ms | 408 KiB | 329 Q