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JavaScript JavaScript Loops, Arrays and Objects Simplify Repetitive Tasks with Loops `do ... while` Loops

Posted by Hakim Rachidi
Hakim Rachidi
38,489 Points

There is a much shorter way?! (leave out the currentGuess variable)

Instead of using a new Boolean variable inside of the if statement we could use the while condition to check wether the guess was the random number. This would be much more readable, shorter and memory efficient( one bool ;) and an if statement)

Is there any reason why Dave did that instead of this :

var randomNumber = getRandomNumber(10);
var guess;
var guessCount = 0;

function getRandomNumber( upper ) {
  var num = Math.floor(Math.random() * upper) + 1; 
  return num;
}

do {
  guess = prompt("Guess my number between 1 and 10!");
  guessCount += 1;
} while ( parseInt(guess) !== randomNumber)

alert("You got my number after " + guessCount + " attemps!");

2 Answers

Steven Parker
Steven Parker
229,644 Points
Steven Parker
Steven Parker
229,644 Points

I'm just guessing, but perhaps it was just an opportunity to illustrate the concept of using a Boolean value as a loop control, which can be handy in more complex programs.

I agree that in this case, simply testing the condition directly in the loop conditional clause is more concise and easily read.

elpsycongroo
elpsycongroo
2,368 Points
elpsycongroo
elpsycongroo
2,368 Points

I did mine the exact same as yours ;)