allcalc

<!DOCTYPE html>
<html>
    <head>
        <title>Titular Title</title>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
    </head>
    <body>
        <script type="text/javascript">
operation=-1;
while (operation != 0)
{
   var operation=prompt("Which operation do you wish to do?\n0: End Program\n1: Addition\n2: Subtraction\n3: Multiplication\n4: Division\n5: Square Root","");
  //addition, subtraction, multiplication, or division
  if (operation>0 && operation<5)
  {
  var num1=parseInt(prompt("Enter the first number.",""));
  var num2=parseInt(prompt("Enter the second number.",""));
  if (operation==1) alert("The sum is "+(num1+num2));
  if (operation==2) alert("The difference is "+(num1-num2));
  if (operation==3) alert("The product is "+(num1*num2));
  if (operation==4) alert("The quotient is "+(num1/num2));
  }
  //square root
  else if (operation==5)
  {
  var num1=parseInt(prompt("Enter the number you want to take the square root of.",""));
  alert("The square root is "+Math.sqrt(num1));
  }
  else
  {
  if (operation!=0) alert("That wasn't one of the options");
  }
}
</script>
        <div>Titular Content</div>
    </body>
</html>