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

Jonathan Leon
Jonathan Leon
18,813 Points
Posted by Jonathan Leon
Jonathan Leon
18,813 Points

I think my loop is same as his but shorter, any thoughts? 

do { 

  guess = prompt("IM THINKING OF A NUMBER BETWEEN 1 TO 10, WHAT IS IT?");
  guessCount +=1;


} while (parseInt(guess) != randomNumber )

  document.write("Correct,the number was " + randomNumber + " It took you " + guessCount + " attempts to guess the number.");
Marcus Parsons
Marcus Parsons
15,719 Points

Looks good, Jonathan!

Seth Reece
Seth Reece
32,867 Points
Seth Reece
Seth Reece
32,867 Points

I did mine completely different by writing to the document inside the if statement, then calling break; e.g. 

do {
  guess = prompt("I'm thinking of a numnber between 1 and 10. What is it?");
  guessCount += 1;
  if (parseInt(guess) == randomNumber) {
    document.write("<p>Congradulations! You go it in " + guessCount + " tries!</p><p>The number was " + randomNumber + "!</p>");
    break;
  }
} while ( guess !== randomNumber )
Roman Rodionov
Roman Rodionov
6,810 Points
Roman Rodionov
Roman Rodionov
6,810 Points

My syntax shorter too :)

var upper = 10;
var tries = 0;
var prog = program(upper);
function program(upper) {
  return Math.floor(Math.random() * upper) + 1;
}

do {
  var message = prompt('Try to guess the number!');
  tries += 1;
} while(parseInt(message) !== prog);

document.write('Got it in ' + tries + ' time!');
Iain Simmons
Iain Simmons
Treehouse Moderator 32,305 Points

Hi Jonathan Leon, just letting you know I added code formatting/syntax highlighting.

1 Answer

Iain Simmons
MOD
Iain Simmons
Treehouse Moderator 32,305 Points
Iain Simmons
Iain Simmons
Treehouse Moderator 32,305 Points

Yes, your code also works! Note that as mentioned in previous videos/courses, you should do a strict equality/inequality check:

} while (parseInt(guess) !== randomNumber)

Technically you could shorten the loop even further, though I wouldn't recommend using this syntax:

do
  guessCount++;
while (parseInt(prompt("IM THINKING OF A NUMBER BETWEEN 1 TO 10, WHAT IS IT?")) !== randomNumber)

You could even have that on one line, to make it shorter, but even harder to read and understand! :)