PHP Tutorial - PHP atan2() Function
Definition
The atan2() function returns the arc tangent of two variables x and y.
Syntax
PHP atan2() function has the following syntax.
atan2(y,x);Parameter
The parameters for PHP atan2() function are listed below.
| Parameter | Is Required | Description |
|---|---|---|
| y | Required. | Dividend |
| x | Required. | Divisor |
Return
| Item | Value |
|---|---|
| Return Value | The arc tangent of y/x in radians, which is between -Pi and Pi |
| Return Type | Float |
Example
Return the arc tangent of two variables with the atan2() function:
<?php
echo(atan2(-10,10));
?>
The code above generates the following result.
