While Loops
A while loop is just that, it’s a section of code that continues to carry out a few actions “while” the condition is true. We start with the word while followed by the condition that’s true in parentheses (), and then put the action (or actions) to be performed inside of curly brackets {}. Here is the set up:
// While loop setup
while (condition is true) {
// action to perform
}
Now let’s jump into some examples!
Examples
Say we want to create a loop that runs 8 times.
// 8x example
let i = 0; // set a counter variable
while (i < 8) {
i++; //moves to the next iteration of the loop (makes the loop run through this part again)
}
The condition could also be a statement, such as a boolean (true/false). For example, say we wanted to read through different comments on a video until we read all of them. To do this in a while loop we would need a few different variables (you can ignore the fancy node words).
const commentIterator = video.createNodeIterator(video, NodeFilter.SHOW_COMMENT) // this is a way to move from one comment to the next on the video
let currentComment; // this is a placeholder for the current comment
// this while loop will keep looping while there is a "nextNode" which is another way of saying there is another comment after this
while (currentComment = commentIterator.nextNode()) {
console.log(currentComment.textContent.trim()); //this prints out the current comment so we can read it!
}