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

Posted by JAH Resink
JAH Resink
360 Points

while loop

var count = 0 while ( count < 26 ) { document.write(count); count +1; }

what is wrong?

script.js 
var count = 0
while ( count < 26 ) {
  document.write(count);
  count +1;
}

2 Answers

Jennifer Nordell
seal-mask
STAFF
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher
Jennifer Nordell
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher

Hi there! You've inadvertently created an infinite loop. Although you're adding 1 to count each time, you're never actually assigning the value back into count. Here's three alternatives:

count += 1;

count++;

count = count + 1;

All three of these lines do the same thing. They take the count, add one to count, and then place the resulting value back in as the new value of count.

Hope this helps! :sparkles:

Luke Pettway
Luke Pettway
16,593 Points
Luke Pettway
Luke Pettway
16,593 Points

You are creating an infinite loop. count + 1 isn't incrementing the count but taking 0 and adding 1 to it. So each iteration is 1.

var count = 0
while ( count < 26 ) {
  document.write(count);
  count +1;
 console.log(count +1);
}

Will output like this: 1 1 1 1 1 1 1

When you are incrementing a number by one you can opt to do this instead:

var count = 0
while ( count < 26 ) {
  document.write(count);
  count++;  //<-- This equates to count = count+1 
}