Where did I make a mistake??

Question

<script>
var first = prompt("Enter an integer","0");
var second = prompt("Enter another integer","0");
var s = first + second;
var d = first - second;
var m = first * second;
var q = first / second;
document.write("Toplama işleminin sonucu " + s + "<br />");
document.write("Çıkarma işleminin sonucu " + d + "<br />");
document.write("Çarpma işleminin sonucu " + m + "<br />");
document.write("Bölme işleminin sonucu " + q + "<br />");
</script>

S is not working.
Other operations are working correctly, but addition (var s) is not working. Where did I go wrong? I can't see it. Please help me.

Answer 1

promt accept input in string farmat..
And addition + operator works as cancatination operation for string.. So you need convert string values to numbers..
Ex:
var first= Number(promt("enter")) ;

Or just you can use + as +promt("text") ;