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sqrt

Square root (PHP 4, PHP 5)
float sqrt ( float arg )

Returns the square root of arg.

Parameters

arg

The argument to process

Return Values

The square root of arg

Examples

Example 1161. sqrt() example

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


See Also
pow()


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