   #PHP Manual Mathematical Functions sinh srand

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                                     sqrt

   (PHP 3, PHP 4 )
   sqrt -- Square root

Description

   float sqrt ( float arg)

   Returns the square root of arg.

   <?php
   // Precision depends on your precision directive
   echo sqrt(9); // 3
   echo sqrt(10); // 3.16227766 ...
   ?>

   See also pow().
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