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JavaScript JavaScript Loops, Arrays and Objects Simplify Repetitive Tasks with Loops A Closer Look At Loop Conditions

Raeed Sabree
Raeed Sabree
10,664 Points
Posted by Raeed Sabree
Raeed Sabree
10,664 Points

add a while loop so that a prompt keeps appearing until the user types :sesame: into the prompt

i know i did something wrong here

app.js 
var secret = prompt("What is the secret password?");

document.write("You know the secret password. Welcome.");

while (sesame) {

}
index.html 
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript Loops</title>
</head>
<body>
<script src="app.js"></script>
</body>
</html>

2 Answers

James Anwyl
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
James Anwyl
Full Stack JavaScript Techdegree Graduate 49,960 Points
James Anwyl
.a{fill-rule:evenodd;}techdegree seal-36
James Anwyl
Full Stack JavaScript Techdegree Graduate 49,960 Points

Hi,

To use a while loop you need a condition and a statement.

while(condition) {
statement
}

For example:

var aVariable = "i am a string";

while(aVariable === "i am a string") {
  // do something
}

This loop will continue to do something as long as the condition is true. i.e as long as the variable 'aVariable' is equal to the string "i am a string".

You could also do the opposite using a slightly different condition, this time using ! which means not:

var aVariable =  "i am a string";

while(aVariable !==  "i am a string") {
  // do something
}

This time the loop will only do something while aVariable is not equal to "i am a string".

Check out while loops and comparison operators

Hope this helps :)

jag
jag
18,266 Points
jag
jag
18,266 Points 
var secret = prompt("What is the secret password?");



while (secret !== "sesame"){
  secret = prompt("Incorrect, try again.")
}

document.write("You know the secret password. Welcome.");

Sesame is the response they need give. If the response isn't "sesame" then it will loop and you will have to create a new prompt within the while.