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JavaScript

Posted by Giovanni Dalla Rizza
Giovanni Dalla Rizza
10,637 Points

Node.js | web server creation

Can someone explain me this part of code? What's \n? Is this a loop? (can't recognize the syntax)

setInterval(function(){
    response.write(i + "\n");
    if(i === 0) {
      response.end("Blast off\n");
    }
    i--;
  }, 1000);

1 Answer

Kevin Korte
Kevin Korte
28,149 Points

Well, it's a countdown timer, something else must be calling this, and somehow setting i. But let's assume i = 5. setInterval is a javascript function that does something at an interval, in this case, every 1000 milliseconds, or 1 second this runs.

\n is just a new line character, for human friendly readability

So if i was 5, it out put this

5

4

3

2

1

0

Blast off

Over a 6 second span of time, it would countdown every second. Basically, and we write i, we're subtracting 1 from i. Eventually, i = 0, is when it displays Blast off.