Hi I need some help

Question

I'm doing a task for JS, and I need to do with a while loop a count down, that has to be in this order:
4
3
2
1
0
The problem is that I don't know how to do it backwards like in the example, I know how to do it the normal way:
0
1
2
3
4
If anyone could help me out I'll appreciate it

Answer 1

Yes, if you save it as Node.js code then it will trigger that error;

You'd have to save it as Web code.

Answer 2

https://code.sololearn.com/Wb2Ei8G537i5/?ref=app

Answer 3

Looping forwards means to initialize loop counter by range start, and increment loop counter while loop counter is less than the range end.

Looping backwards means to initialize loop counter by range end, and decrement loop counter while loop counter is greater than the range end.

Answer 4

It's pretty easy. We only need to change some things ...

The loop condition should check whether loop counter <seconds> is greater than or equal to zero, and we decrement the loop counter <seconds> rather than incrementing it.

while( seconds >= 0 )
{
document.write( seconds + "<br />" );
seconds--;
}

Tell me in case of any doubt ...

Answer 5

Bob_Li thanks man it work with out the <br /> Cristo bless you

Answer 6

Ipang thanks man for help me with the code, it means a lot wen you're learning, Crist bless you 👍

Answer 7

Ipang you are right but I don't know how to do it exactly, I have this code that do the loop:
function main() {
var seconds = parseInt(("4"), 10)
var x=0;
while (x<seconds) {
document.write(x + "<br />");
// break;
x++;
}
}
main();

The thing is that wen I try to decrease the counter it doesn't work, I do not run

Answer 8

Ipang ok I'm going to try it

Answer 9

Ipang for some reason when I run the code it says "reference error,document don't defined" and when I use (console.log) the results are in this way:
4<br />
3<br />
2<br />
1<br />
0<br />

Answer 10

Ipang yeah you right but when you're doing the task the code play ground have it set it as a Node.js

Answer 11

Ipang In the normal code play ground it works I don't know how to make it work

Answer 12

in code coach you use console.log

function main() {
var seconds = parseInt(readLine(), 10)
// Your code here
while(seconds>=0){
console.log(seconds);
seconds--;
}
}

Answer 13

Because you are incrementing with x++. You need decrement by x--
While (seconds !== 0) { seconds--; }

Answer 14

for (let x = 4; x >= 0 && x <= 4; x--) { console.log(x)}

But this is better way:
https://code.sololearn.com/Wb2Ei8G537i5/?ref=app
Thanks Justice Friday

Answer 15

Give starting value like i=4 then reduce it i--