Question

How to find cube root in PHP

Answer 1

function cubeRoot($n) {
    if ($n >= 0)
        return pow($n, (double) 1 / 3);
    else
        return -pow((-$n), (double) 1 / 3);
}
  
$n = 27;
  
echo cubeRoot($n) . "\n";
echo cubeRoot(16) . "\n";
echo cubeRoot(-27) . "\n";
echo cubeRoot(64) . "\n";



/*
run:

3
2.5198420997897
-3
4

*/

 

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