The sqrt Function
The sqrt function finds the square root
of a number.
Syntax
sqrt(number);
Example
Let's calculate the square root of 16:
<?php
echo sqrt(16);
?>
Code execution result:
4
Example
Let's calculate the square root of 5:
<?php
echo sqrt(5);
?>
Code execution result:
2.2360679774998
See Also
-
the
powfunction,
which raises a number to a power -
the lesson exponentiation,
which explains the**operator -
the
roundfunction,
which rounds a number according to mathematical rules
