// jshint esversion: 6

function hypotenuse(a, b){
   return Math.sqrt(a**2 + b**2);
}

let hypot, h2, sideA, sideB;

//Input:
sideA = prompt("enter A");
sideB = prompt("enter B");

//Processing:
hypot = hypotenuse(sideA, sideB);

//Output:
console.log("sideA = " + sideA + " sideB = " + sideB + " hypotenuse = " + hypot);