While Loop question (need help pls)

[Pendejo]

Hallo, maybe someone can help me.
Where did i a mistake in this code?

[takJohn]

You haven’t defined the variable ‘a’ yet - did you want to use the ‘countdown’ variable instead like below:

  var countdown = 5;
  while(countdown >= 1) {
    document.write("I'll see u in " + countdown + "! ");
    countdown--;
  }

[Pendejo]

THX a lot
but after correction still nothing happens

[takJohn]

Ah - your script attribute is set incorrectly, you have test instead of text meaning it should look like this: <script type="text/javascript">

[Pendejo]

OMG!!! THANK U VERY MUCH!!! I was about to give up, could not see that mistake at all. THX a lot again))))))))))))))))))))))))!!!

[ejaymejr]

<script>
</script> 
will do...

[bjamRez]

I did not understand #28 “While loop input” answer in JavaScript.

What is “inp”

ex.1

let num = parseInt(inp);

[ivga80]

Hi bjamRaz.

In the solution, the inp is defined as the result of the user input, like this:

var inp = prompt("Enter a number");

This means that, if the user input the number 10, then the variable inp will contain the number 10.

So if you:
console.log(inp)

The result in the console would be:

10

Now back to the example:

parseInt(inp);

inp is refering to:

var inp = prompt("Enter a number");

in the line above as in the solution.

Also, inp is just as short way of writing input.

It’s the same as writing:

var resultFromUserInput = prompt("Enter a number");

var number = parseInt(resultFromUserInput);

var counter = 0;

While (counter < number) {

         console.log(counter);
         counter++;
}

I hope this made it clearer for you. I would advise you to read more on how variables work.

You can read more here:
W3Schools variables

Good luck!

[bjamRez]

I see, thanks for that. And what is the difference between parseFloat() and parseInt?

[ivga80]

Hi, bjamRez.
I’m sorry for the late reply, you probably already figured it out by now, but I’ll add a link to a great page explaining the difference between parseInt() and parseFloat().

Difference between parseInt() and parseFloat()

Good luck!