sqrt

Definition and usage

sqrt() function returns the square root of a number.

Example

In this example, we will return the square root of different numbers:

 <?php
echo ( sqrt ( 0 ) ) ;
echo ( sqrt ( 1 ) ) ;
echo ( sqrt ( 9 ) ) ;
echo ( sqrt ( 0.64 ) ) ;
echo ( sqrt ( - 9 ) ) ;
?>

Try it yourself

grammar

 sqrt ( x )

illustrate

Returns the square root of x .