Question

How to calculate square root in PHP

Answer 1

$value = 121.0;
   
echo "The square root of " . $value . " is " . sqrt($value) . "\n";


   
/*
run:
    
The square root of 121 is 11
    
*/

 

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Answer 2

$value = 121.0;
   
echo "The square root of " . $value . " is " . pow($value, 0.5) . "\n";
   
   
   
/*
run:
    
The square root of 121 is 11
    
*/

 

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Answer 3

$a = 9;
echo sqrt($a) . "\n";
   
$b = 85;
echo sqrt($b) . "\n";

  
  
  
/*
run:
      
3
9.2195444572929
  
*/

 

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