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@ 2017-04-22T13:14:18Z

<?php

if (sqrt(7) == floor(sqrt(7)))
    echo "7 is a perfect square";
    
if (sqrt(9) == floor(sqrt(9)))
    echo "9 is a perfect square";

Output
Performance
VLD
References
Branches

floor: documentation ( source)
sqrt: documentation ( source)

preferences:dark modelive previewkey bindings

41.5 ms | 409 KiB | 6 Q