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Henning Holm
4,163 PointsBetter than while?
Any argument why rather use "do while" instead of this:
while (!correctGuess){
guess = prompt("Guess a number between 1 and 10!");
guessCount++;
if(parseInt(guess)===randomNumber){
correctGuess=true;
}
}
2 Answers
Jason Anders
Treehouse Moderator 145,860 PointsHi Henning,
As a while loop will only execute if the condition is met, how do you know if the guess is correct or not before the person has a chance to guess? If the user hasn't guessed yet (as the loop can't run the code block), then the loop doesn't know if !correctGuess is true of false.
A do/while loop will always execute at least once, regardless of the condition. This way, the code executes, the user guesses, the guess is checked... then the loop checks the condition to see if it will run again.
So, a do/while is more logical, more clear, and more safe as you don't need to hard-code an initial value for correctGuess in order for the loop to run.
Keep Coding! :)
Oussama Moulana
2,977 PointsI get it the difference between While and Do While loop but the thing is the exercise in this video work if we use While. Maybe it should be more appropriate to do an example with an exercise which work only with a Do While loop?