Kotlin atan2()

The atan2() method in Kotlin’s math class is used to calculate the angle (in radians) between the positive x-axis and a point specified by its Cartesian coordinates (x, y).

Syntax

import kotlin.math.*
val angle = atan2(y, x)

• x: The x-coordinate of the point.
• y: The y-coordinate of the point.

The atan2() method returns a value of type double representing the angle in radians. The result will be in the range of -π to π.

Example

This example shows how use the atan2() method to calculate the angle between the positive x-axis and a point with coordinates (3.0, 4.0):

import kotlin.math.*
fun main() {
  val x = 3.0
  val y = 4.0

  val angle = atan2(y, x)
  println("The angle between the positive x-axis and the point ($x, $y) is $angle radians.")
}

Copy to clipboard
Copy to clipboard

The code above will result in the following output:

The angle between the positive x-axis and the point (3.0, 4.0) is 0.9272952180016122 radians.

Copy to clipboard
Copy to clipboard