A simple while loop
A while loop is another control structure, like if/else. while lets us automate the repetition of instructions to make our code more readable and concise.
In this exercise, you will write a while loop that loops three times. Using an incrementing counter variable and if/else logic, you will print "winner" in the first iteration of the loop, "winner" again in the second iteration, and "chicken dinner" in the third and final iteration. This printed message won't be used in the Twenty-One program exactly, though it could be used in the context of congratulating a player if they win a round.
This exercise is part of the course
Introduction to Scala
Exercise instructions
- Define a counter variable,
i, equal to zero. - Define the number of iterations for the
whileloop,numRepetitions, equal to three. - Fill out the first
ifclause so "winner" is printed in the first iteration of the loop, then "winner" again in the second iteration, and "chicken dinner" in the final iteration. - Increment the counter variable by one. If you don't do this, your code will run indefinitely and the console will crash.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
// Define counter variable
___ i = ___
// Define the number of loop iterations
___ numRepetitions = ___
// Loop to print a message for winner of the round
___ (___ ___ ___) {
if (___ < ___)
println("winner")
else
println("chicken dinner")
// Increment the counter variable
___
}