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run code in 300+ PHP versions simultaneously
<?php $i = $j = 0; $b = rand(1, 100); while($i++ < 10000) { $a = rand(1, 100); if(abs($a - $b) <= 1) { $j++; } } print "{$j} von {$i}"."\n"; print round(($j/$i)*100, 2)."%";

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31.74 ms | 402 KiB | 5 Q