Question

Hi I’m trying to create a simple countdown.
Here is my code but it’s not working.
Can you help me find the problem?

function count() {
    for (var cc=20,cc > 0,cc--) {
        document.getElementById("cco").innerHTML=cc;
    }
}
count();

Answer 1

You’re using commas instead of semicolons.

for (var cc=20,cc > 0,cc--)

should be

for (var cc=20;cc > 0;cc--)

However, this probably won’t do what you think it will, as the loop will count all the way to 0 immediately (so the user won’t even see the countdown). I’m guessing you wanted something like:

var cc = 20;

var interval = setInterval(function()
{
    document.getElementById("cco").innerHTML = -- cc;

    if (cc == 0)
        clearInterval(interval);

}, 1000);

See setInterval and clearInterval for more information.