export function atan2(y: number, x: number): number {
  //      discuss at: https://locutus.io/php/atan2/
  // parity verified: PHP 8.3
  //     original by: Brett Zamir (https://brett-zamir.me)
  //       example 1: atan2(1, 1)
  //       returns 1: 0.7853981633974483

  return Math.atan2(y, x)
}