Distance formula in Node.js

distance.js

let x1 = process.argv[2],
    y1 = process.argv[3],
    x2 = process.argv[4],
    y2 = process.argv[5];

/**
 * Return the distance between two points for the given coordinates.
 * 
 * @param {Number} x1 - x coordinate for the first point.
 * @param {Number} y1 - y coordinate for the fisrt point.
 * @param {Number} x2 - x coordinate for the second point.
 * @param {Number} y2 - y coordinate for the second point.
 * @returns {Number} Distance between p1 and p2.
 */
function distance(x1, y1, x2, y2) {
  return Math.sqrt(Math.pow(x1 - x2, 2) + Math.pow(y1 - y2, 2));
}

console.log(distance(x1, y1, x2, y2));