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JavaScript JavaScript Basics (Retired) Making Decisions with Conditional Statements Introducing Conditional Statements

Cipriano Mauricio
Cipriano Mauricio
3,560 Points
Posted by Cipriano Mauricio
Cipriano Mauricio
3,560 Points

Bummer! There was an error with your code: TypeError: 'null' is not an object (evaluating 'answer.toUpperCase')

This code works. Why am i getting this message?

app.js 
var answer = prompt("What is the best programming language?");
if (answer.toUpperCase() == "JAVASCRIPT") {
   alert("You are correct")
}
index.html 
<!DOCTYPE HTML>
<html>
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <title>JavaScript Basics</title>
</head>
<body>
<script src="app.js"></script>
</body>
</html>

1 Answer

Grace Kelly
Grace Kelly
33,990 Points
Grace Kelly
Grace Kelly
33,990 Points

While your method is correct, the challenge wants you to check if the answer is equal to "JavaScript" and not "JAVASCRIPT", so you need to do remove the .toUpperCase() method and replace the "JAVASCRIPT" to "JavaScript". Also it would be a good idea to use "===" instead of "==" to compare, like so:

var answer = prompt("What is the best programming language?");
if (answer == "JavaScript")  { //if the answer is equal to the string "JavaScript"
  alert("You are correct");
}

Hope that helps!!

Cipriano Mauricio
Cipriano Mauricio
3,560 Points
Cipriano Mauricio
Cipriano Mauricio
3,560 Points

Thank you Grace for your help. BTW, you have a great name.

Grace Kelly
Grace Kelly
33,990 Points
Grace Kelly
Grace Kelly
33,990 Points

no problem!! haha thanks :)