FAQ: Loops - The While Loop


#1

This community-built FAQ covers the “The While Loop” exercise from the lesson “Loops”.

Paths and Courses
This exercise can be found in the following Codecademy content:

Web Development

Introduction To JavaScript

FAQs on the exercise The While Loop

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#2

const cards = [‘diamond’, ‘spade’, ‘heart’, ‘club’];
let currentCard = ;
while (currentCard !== ‘spade’) {
currentCard = cards[Math.floor(Math.random() * 4)];
console.log(currentCard);
}

Hi,
I don’t undestand what stop this code from running forever? The varible currentCard is not ‘spade’, soas I see it, it should run forever.
Thank’s.


#3

Hi!

I had the same question but figured it out. A loop is gonna keep doing the same action over and over as long as it’s condition is true, meaning in this scenario that the random card is not ‘spade’. When it runs a few times eventually it’ll come across ‘spade’ which makes the condition false causing the loop to stop. This is why your output always ends with ‘spade’ but you won’t see it earlier.

Hope that helps. :wink:


#5

How can you tell how many times it ran, before it found “spades”?


#6

My buddy helped me with this:

const cards = [‘diamond’, ‘spade’, ‘heart’, ‘club’];

// Write your code below

let currentCard = "";

let i = 0;

while (currentCard != "spade"){

i = Math.floor(Math.random() * 4);

currentCard = cards[i];

console.log(currentCard);

console.log(i);

}

//this outputs each random number and it’s pick