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JavaScript JavaScript Loops, Arrays and Objects Simplify Repetitive Tasks with Loops Create a while Loop

Posted by Jason Peay
Jason Peay
16,515 Points

How to Repeat a Loop?

In this challenge, you will create a while loop that prints to the document 26 times. We've added a variable named count, use it to track the number of times the loop runs. Don't forget to use the document.write() method inside the loop.

script.js 
var count = 0;
while ( counter < 26 ) {
var count = 26;
  document.write(count);
  counter ++;
}
George Kiknadze
George Kiknadze
837 Points

In your code there is a mistake:

  1. you don't need second variable declaration inside while loop.
  2. you are incrementing counter variable which doesn't even exists.
var count = 0;
while(count < 26) {
  document.write(count);
  count ++;
}

I these is the right answer :)

I hope I helped you.

2 Answers

Billy Bellchambers
Billy Bellchambers
21,689 Points
Billy Bellchambers
Billy Bellchambers
21,689 Points

You are pretty close however there is an issue with your code.

Your code and issues.

var count = 0;
while ( counter < 26 ) {
var count = 26; //this line set count to 26 on first entry into while loop this means the only value of count that writes to document is 26, after this first pass count = 27 the while argument no longer passes and no further loops are made.
  document.write(count);
  counter ++; //you need to increment the var count (counter isnt currently defined or even part of the argument tested in the while loop)
}

Correct code as follows 

var count = 0;
while (count<26) {
  document.write(count);
  count++;
}
Jason Peay
Jason Peay
16,515 Points

Thanks for your help, Billy

Charles Smith
Charles Smith
7,575 Points
Charles Smith
Charles Smith
7,575 Points

Let's look at the code:

var count = 0; // sets a count variable
while ( counter < 26 ) { // sets our condition against a --counter-- variable, which we haven't defined yet
var count = 26; // sets the value of count to 26
  document.write(count); // writes the value of count, which should be 26, to the page
  counter ++; // increments the undefined counter variable.
}

Instead, let's try:

var counter = 0; // the variable we'll use to count how many times the loop runs and print to the page
while ( counter < 26 ) { // this line sets the condition which will break the loop
  document.write(counter); // writes the current value of counter to the page
  counter ++; // increments the counter by 1
}

Hope that helps!