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PHP sqrt() - Math Functions
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Tutorials » Php »
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Topic |
What is sqrt Function?
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Explanation |
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The "sqrt()" function returns the square root of a number.
Syntax:
sqrt(x)
In the above syntax "x" is the number for which the square root is to be calculated.
Example:
<?php
echo(sqrt(0)) ."</br>";
echo(sqrt(1)) ."</br>";
echo(sqrt(4)) ."</br>";
echo(sqrt(0.49)) ."</br>";
echo(sqrt(-4)) ."</br>";
?>
Result:
0
1
2
0.7
NAN
In the above example the square root for a negative number returns "NAN".
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A Note |
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