Java - atan2() Method

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Description

The method converts rectangular coordinates (x, y) to polar coordinate (r, theta) and returns theta.

Syntax

double atan2(double y, double x)

Parameters

Here is the detail of parameters −

• X − X co-ordinate in double data type.

• Y − Y co-ordinate in double data type.

Return Value

• This method returns theta from polar coordinate (r, theta).

Example

Live Demo

public class Test { 

   public static void main(String args[]) {
      double x = 45.0;
      double y = 30.0;

      System.out.println( Math.atan2(x, y) );
   }
}

This will produce the following result −

Output

0.982793723247329

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