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run code in 150+ php & hhvm versions
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<?php $rad = 1; $deg = rad2deg($rad); printf("rad: %.f = deg: %.20f \n", $rad, $deg);
Output for 4.3.0 - 5.6.28, 7.0.0 - 7.1.0
rad: 1.000000 = deg: 57.29577951308232286465
Output for hhvm-3.10.0 - 3.12.0
rad: 1.000000 = deg: 57.29577951308219496696