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# PERL atan2 Function

## Syntax

atan2 Y,X

## Definition and Usage

Returns the arctangent of Y/X in the range -PI to PI.

## Return Value

- arctangent of Y/X in the range -PI to PI.

## Example

Following is the piece of code, copy and paste this code into a file and verify the result.

    #!/usr/bin/perl

    $Y = 30;
    $X = 60;

    $ret_val = atan2 ($Y, $X );

    print "atan2 of 30/60 is : $retval\n";

This will produce following result

    atan2 of 30/60 is : 0.463647609000806

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