pythagoreamtheorem.js

javascript:(function(){  let sideA = prompt("Length of Side A");  let sideB = prompt("Length of Side B");  let hypotenuse = prompt("Length of Hypotenuse");  if (sideA !== null && sideA !== '' && sideA !== 'x' && !isNaN(sideA)) {    sideA = parseFloat(sideA);    if (sideB !== null && sideB !== '' && sideB !== 'x' && !isNaN(sideB)) {      sideB = parseFloat(sideB);      hypotenuse = Math.sqrt(Math.pow(sideA, 2) + Math.pow(sideB, 2));      alert("Length of Hypotenuse: " + hypotenuse);    } else if (hypotenuse !== null && hypotenuse !== '' && hypotenuse !== 'x' && !isNaN(hypotenuse)) {      hypotenuse = parseFloat(hypotenuse);      sideB = Math.sqrt(Math.pow(hypotenuse, 2) - Math.pow(sideA, 2));      alert("Length of Side B: " + sideB);    } else {      alert("Invalid input.");    }  } else if (sideB !== null && sideB !== '' && sideB !== 'x' && !isNaN(sideB)) {    sideB = parseFloat(sideB);    if (hypotenuse !== null && hypotenuse !== '' && hypotenuse !== 'x' && !isNaN(hypotenuse)) {      hypotenuse = parseFloat(hypotenuse);      sideA = Math.sqrt(Math.pow(hypotenuse, 2) - Math.pow(sideB, 2));      alert("Length of Side A: " + sideA);    } else {      alert("Invalid input.");    }  } else if (hypotenuse !== null && hypotenuse !== '' && hypotenuse !== 'x' && !isNaN(hypotenuse)) {    hypotenuse = parseFloat(hypotenuse);    if (sideA !== null && sideA !== '' && sideA !== 'x' && !isNaN(sideA)) {      sideA = parseFloat(sideA);      sideB = Math.sqrt(Math.pow(hypotenuse, 2) - Math.pow(sideA, 2));      alert("Length of Side B: " + sideB);    } else if (sideB !== null && sideB !== '' && sideB !== 'x' && !isNaN(sideB)) {      sideB = parseFloat(sideB);      sideA = Math.sqrt(Math.pow(hypotenuse, 2) - Math.pow(sideB, 2));      alert("Length of Side A: " + sideA);    } else {      alert("Invalid input.");    }  } else {    alert("Invalid input.");  }})();