珀尔 | atan2()函数

此函数用于计算 -PI 到 PI 范围内的 Y/X 的反正切。

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.

示例 1：

#!/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";

输出：

atan2 of 45/70 is : 0.571337479833627

示例 2：

#!/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";

输出：

atan2 of -30/40 is : -0.643501108793284