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JavaScript The Solution

Jezz Rose
Jezz Rose
2,177 Points

When I type in relevant numbers I get "At least one of the values you typed is not a number. Reload and try again."

// declare program variables var num1; var num2; var message;

// announce the program alert("Let's do some math!");

// collect numeric input 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 ( isNaN(num1) || isNaN(num2) ) { alert("At least one of the values you typed is not a number. Reload and try again."); } else { // build an HTML message 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);

// write message to web page document.write(message); }

2 Answers

Steven Parker
Steven Parker
228,977 Points

Yes, you must first save your changes to be sure you are running the final version. Until saved, the changes made in the editor are only visible on the screen.

Jezz Rose
Jezz Rose
2,177 Points

So after testing it without the "else if" clause leading to the above alert, then reinserting and saving, it seemed to run just fine.

Do I have to save the file before I run? If I don't save does that mean it will run based on the previous saved version?

Thanks