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Perl | atan2() Function

  • Last Updated : 25 Jun, 2019

This function is used to calculate arctangent of Y/X in the range -PI to PI.

Syntax: atan2(Y, X)

Parameters:
Y and X which are axis values

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

Example1:






#!/usr/bin/perl
  
# Assigning values to X and y
$Y = 45;
$X = 70;
  
# Calling atan2() function
$return_val = atan2($Y, $X);
  
# printing the value
print "atan2 of 45/70 is : $return_val\n";


Output:

atan2 of 45/70 is : 0.571337479833627

Example2:




#!/usr/bin/perl
  
# Assigning values to X and y
$Y = -30;
$X = 40;
  
# Calling atan2() function
$return_val = atan2($Y, $X);
  
# printing the value
print "atan2 of -30/40 is : $return_val\n";

Output:

atan2 of -30/40 is : -0.643501108793284
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