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

Posted by Quincey Hollman
Quincey Hollman
1,923 Points

My do loop runs one more time after the correct answer 'sesame' has been inputted. Why is this happening?

I made a few edits and now the prompt isn't even coming up.

script.js 
let secret;
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>

1 Answer

Ben Slivinn
Ben Slivinn
10,156 Points
Ben Slivinn
Ben Slivinn
10,156 Points

Hi, you are stuck in an infinite loop. The do while loop will execute at least one time the code inside "do {}", during the condition in " while ()".

The right structure of the loop should be

do { 
   secret = prompt("What is the secret password?");
} while (secret !== 'seesame);
document.write("You know the secret password. Welcome.");

Literally: Do the code in curly brackets one time at least, then check the condition in round brackets, if the condition met, break the loop, else do the code over again. When the loop breaks, write something.

Quincey Hollman
Quincey Hollman
1,923 Points

I see! Thank you so much for clarifying that Ben. All the sources I looked up tended to underexplain do loops.