PHP sqrt() - Math Functions
What is sqrt Function?
Explanation
The "sqrt()" function returns the square root of a number.
sqrt(x)
In the above syntax "x" is the number for which the square root is to be calculated.
<?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".
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>";
?>
0
1
2
0.7
NAN
In the above example the square root for a negative number returns "NAN".
