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@ 2017-04-29T22:15:38Z

<?php
    
    $a = '36';
    $b = '-35.99';
    
    printf("\n%.2f",($a+$b));

Output
Performance
VLD
References
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printf: documentation ( source)

preferences:dark modelive previewkey bindings

22.32 ms | 474 KiB | 4 Q