<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title></title>
<script type="text/javascript">
do {alert ( "Welcome The calculator");
var s = prompt ( "Please enter the calculation type, + - * /");
var i = prompt ( "Please enter a number");
var j = prompt ( "Please enter the second number");
was result;
switch(s){ case "+":
result =Number(i)+Number(j);
break;
case "-":
result =Number(i)-Number(j);
break;
case "*":
result =Number(i)*Number(j);
break;
case "/":
result =Number(i)/Number(j);
break;
default:
result = "exceeds the calculation type";
}
} While (confirm (result + "; whether to continue?"));
</script>
</head>
<body>
</body> </html>