How to add two numbers?

javascript

Solution

Try this:

var cal = prompt("Please enter what type of calculation you want to do\n" +
  "if you want to add enter = 1\n" +
  "if you want to minus enter = 2\n" +
  "if you want to divide enter = 3\n" +
  "if you want to multiply enter = 4");

if (cal == 1) {
    var a = prompt("Please enter your first number");
    var b = prompt("please enter your second number");

    alert("The result is , " + (Number(a) + Number(b)));
}

else if (cal == 2) {
    var c = prompt("Please enter your first number");
    var d = prompt("please enter your second number");

    alert("the result is , " + (Number(c) - Number(d)));
}

Problem

I wrote a JavaScript calculator... but suppose when I give my first number as `2` and the second number as `3`, the result is showing `23`, but I wanted to add the two numbers. Can anyone please help me? It is also happening when I try to minus the two numbers. Why isn't this working? ``` var cal = prompt("Please enter what type of calculation you want to do\n if you wanna add enter = 1\n if you want to minus enter = 2\n if you want to divide enter = 3\n if you want to multiply enter = 4"); if (cal == 1) { var a = prompt("Please enter your first number"); var b = prompt("please enter your second number"); alert("The result is , " + a+b); } if (cal == 2) { var c = prompt("Please enter your first number"); var d = prompt("please enter your second number"); alert("the result is , " + c - d); } ```

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