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

Posted by vinh chau
vinh chau
1,641 Points

Not sure how to use a While loop for this example

Not sure where to start with this code.

script.js 
var secret = prompt("What is the secret password?");
do {
  secret = prompt("What is the secret password?")   
}
while prompt(secret !== "sesame" )
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>
vincent batteast
vincent batteast
51,094 Points
vincent batteast
vincent batteast
51,094 Points

ok, there are two different loops. do while and while loops. this example is a do while. Why the do key word come 1st.

the different between the do?

do while will go through the loop at least one time.

do{ the code in there will run atleast one time } while{ is the conditions is met the do code will run again }

now a while loop while{the code in there will run in a loop untel the conditions is false }

I hope this help you. Happy coding

1 Answer

Steven Parker
Steven Parker
229,732 Points
Steven Parker
Steven Parker
229,732 Points

The word "prompt" should not appear after the "while", that's a syntax error.

Also, one of the advantages of the "do...while" style is you will only need to call "prompt" once (inside the loop). So outside the loop you just need to declare the variable.