Calculator Code

javascript: var versionCalc = prompt('1). Basic Calculator\n2). Equations');switch (versionCalc) {  case '1':    var operatorType = parseInt(prompt('1). Addition\n2). Subtraction\n3). Multiplication\n4). Division'));    switch (operatorType) {      case 1:        var num1 = parseInt(prompt('First Number:'));        var num2 = parseInt(prompt('Second Number:'));        result = num1 + num2;        break;       case 2:        var num1 = parseInt(prompt('First Number:'));        var num2 = parseInt(prompt('Second Number:'));        result = num1 - num2;        break;       case 3:        var num1 = parseInt(prompt('First Number:'));        var num2 = parseInt(prompt('Second Number:'));        result = num1 * num2;        break;       case 4:        var num1 = parseInt(prompt('First Number:'));        var num2 = parseInt(prompt('Second Number:'));        result = num1 / num2;        break;       default:        alert('That is not a valid input. Input the number of the operation you are trying to run');        break;    };  break;  case '2':    var equationType = parseInt(prompt('1). Slope\n2). Area of a circle\n3). Area of a square/rectangle\n4). Area of a triangle\n5). Volume of a cube\n6). Distance\n7). Time\n8). Speed'));    switch (equationType) {      case 1:        m = parseInt(prompt("What is the rise/run? (M)"));        x = parseInt(prompt("What is the distance of the line from the x-axis? (X)"));        b = parseInt(prompt("What is the Y-Intercept? (B)"));        result = (m * x) + b;        break;      case 2:        r = parseInt(prompt(%27What is the radius of the circle? (R)%27));        r2 = r * r;        result = r2 * 3.14;        break;      case 3:        l = parseInt(prompt(%27What is the length?%27));        w = parseInt(prompt(%27What is the width?%27));        result = l * w;        break;      case 4:        b = parseInt(prompt("What is the base of the triangle?"));        h = parseInt(prompt("what is the height of the triangle?"));        result = (b * h) / 2;        break;      case 5:        l = parseInt(prompt(%27What is the length?%27));        w = parseInt(prompt(%27What is the width?%27));        h = parseInt(prompt(%27What is the height?%27));        result = l * w * h;        break;       case 6:        s = parseInt(prompt(%27What is the speed?%27));        t = parseInt(prompt(%27What is the time?%27));        result = s * t;        break;      case 7:        s = parseInt(prompt(%27What is the speed?%27));        d = parseInt(prompt(%27What is the distance?%27));        result = d / s;        break;      case 8:        s = parseInt(prompt(%27What is the time?%27));        d = parseInt(prompt(%27What is the distance?%27));        result = d / t;        break;            default:        alert(%27That is not a valid input. Input the number of the operation you are trying to run%27);        break;    };  break;  default:    alert(%27That is not a valid input. Input the number of the operation you are trying to run%27);  };alert(%27Your answer is %27 + result);