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

Hanan Al-Mashhadani
Hanan Al-Mashhadani
7,769 Points

I didn't understand this objective

Can someone explain it to me

script.js
var 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

Sam Baines
Sam Baines
4,315 Points

HI Hanan - the reason why using a do...while loop is better for this challenge - because it makes sures that the program executes at least once - where as a plain while loop in theory can make it so that the contents inside the loop do not ever execute, which could cause the program to function unexpectedly. PLus with the do...while it means less more concise code can be used (you only need to call the prompt once) like below:

var secret = "";

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

Hope this helps.

Hanan Al-Mashhadani
Hanan Al-Mashhadani
7,769 Points

Thank you ! Sam Baines , it's really help i can understand now what's this objective do :)