Programming in Kotlin: Fundamentals

It’s time for your next challenge! Your challenge is to create a loop that counts down from 10. and instead of zero, you should print out the words, “Blast Off!”. That’s right, you’re launching rockets from the comfort of your home or office or wherever you’re watching this course from.

Pause the video and try it out.

Hint: The word “Blast Off!” can be printed outside the loop.

How’d the challenge go for you? Hopefully, you did well.

Let’s start by creating a new counter variable and set it to 10.

var counter = 10;

Its time to add the while loop. This loop will run so long as the counter is greater than zero. Add in the following code:

while (counter > 0) {

}

Next print out the counter then make sure to decrement it.

print(counter);
counter -= 1;

Finally after the loop, print out the text ‘Blast Off!’.

print('Blast Off!');

And that’s it - you have a countdown. Now run the project. You get a countdown followed by the words, Blast Off!.