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# Is is possible to do it for all inputs differently using what we have learned so far?

I was trying to do it for all options, But this code didn't work. Please help

```var num1 = "";
var num2 = "";
var message = "";

alert("Let's do some math!");

num1 = prompt("Please type a number");
num1 = parseFloat(num1);

num2 = prompt("Please type another number");
num2 = parseFloat(num2);

if(num2 === 0){
alert("The second number is 0. You can't divide by zero. Reload and try again.")
}else if(num1 === 0){
alert("The first number is 0. You can't divide by zero. Reload and try again.")

}else if(isNan(num1)){
alert("The first number is not a number. Reload and try again.")

}else if(isNaN(num2)){
alert("The second number is not a number. Reload and try again.")

}else{

message = "<h1>Math with the numbers " + num1 + " and " + num2 + "</h1>";
message += num1 + " + " + num2 + " = " + (num1 + num2);
message += "<br>";
message += num1 + " * " + num2 + " = " + (num1 * num2);
message += "<br>";
message += num1 + " / " + num2 + " = " + (num1 / num2);
message += "<br>";
message += num1 + " - " + num2 + " = " + (num1 - num2);

document.write(message);
}
```

## 1 Answer

One thing I noticed is that it is not necessary to test the first number for 0, since it is perfectly OK for the numerator to be 0 in division.

Otherwise, this code seems to work, exactly which "options" does it not handle?

And was my answer to your previous question helpful? I noticed you didn't use it here.