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JavaScript JavaScript Loops, Arrays and Objects Simplify Repetitive Tasks with Loops Create a `do...while` loop

David Dehghani
David Dehghani
6,992 Points
Posted by David Dehghani
David Dehghani
6,992 Points

Do while loops

I'm prompting the user the question and the condition is checking if it matches, but I'm not sure how to declare the variable before starting the do while loop.

Thanks!

script.js 
var secret = "sesame";
do {
secret = prompt("What is the secret password?");}
while ( secret !== "sesame" ) {
  secret = prompt("What is the secret password?");    
}
document.write("You know the secret password. Welcome.");
index.html 
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript Loops</title>
</head>
<body>
<script src="script.js"></script>
</body>
</html>

2 Answers

Jennifer Nordell
seal-mask
STAFF
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher
Jennifer Nordell
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher

Hi there! I can see you've worked on this and maybe even overworked it a bit, so I'm going to give some hints and pseudocode here.

Hints

  • Try declaring the secret to be set as an empty string.
  • Your while loop is set up incorrectly
  • Only one prompt is needed

pseudocode

declare variable secret
begin do {
     prompt the user for their secret word guess
} while the secret is not sesame
print success message

Hope this helps, but let me know if you're still stuck! :sparkles:

Steven Parker
Steven Parker
231,007 Points
Steven Parker
Steven Parker
231,007 Points

:point_right: Your declaration is good, but your loop syntax needs a bit of work.

The syntax for a "do...while" loop looks like this:

do {
  // body of loop code goes here
} while ( /* condition expression goes here */ );

An advantage of using this type of loop in this situation is that you will need only one prompt statement.

Also, while your variable declaration should pass as-is, you could reduce it by leaving off the initial assignment. The initialization is not needed here as it will get overwritten when it is assigned with the return value of the prompt.