JavaScript for Loop

Question

Write odd numbers from 1 to 100.. And I used this piece of code for this:

var i=1;
for (i=1; i < 51; i = i + 1){

 document.write(i -1 + i );
  document.write("<br />");
  }

Now, can somebody please tell me if this code is right or I can make it better.

Perhaps its worth a read of this question -> http://stackoverflow.com/questions/802854/why-is-document-write-considered-a-bad-practice — Undefined, Jun 13 '12 at 11:01

CD.. · Answer 1 · 2012-06-13T11:35:30.097

9

for (var i=1; i < 100; i += 2){
  document.write(i);
  document.write("<br />");
}

edited Jun 13 '12 at 11:35

answered Jun 13 '12 at 11:01

CD..

This will write odd numbers up to and inc. 49 not up to 100 as the OP asks. – Barry Kaye Jun 13 '12 at 11:04
Can you please tell me, why can't I use i < 100 for this code? Like when I did it, the results were shown 1 to 200 odd numbers. – Azib Yaqoob Jun 13 '12 at 11:05

score 4 · Answer 2 · answered Jun 13 '12 at 11:01

4

for (var i=1; i <= 100; i += 2)
    document.write(i + "<br />");

answered Jun 13 '12 at 11:01

Danilo Valente

This will write odd numbers up to and inc. 49 not up to 100 as the OP asks. – Barry Kaye Jun 13 '12 at 11:05

score 2 · Answer 3 · answered Jun 13 '12 at 11:03

2

It's wrong and you can make it better. Start at 1 and count up to 100 in increments of 2:

for (var i=1; i < 100; i += 2){
  document.write(i);
  document.write("<br />");
}

The usual caveats about document.write() apply.

answered Jun 13 '12 at 11:03

Andrew Leach

3 Answers3