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.

• Undefined: Perhaps its worth a read of this question -> stackoverflow.com/questions/802854/…

Answer 1

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

http://jsfiddle.net/kX8hn/

• Barry Kaye: This will write odd numbers up to and inc. 49 not up to 100 as the OP asks.
• Azib Yaqoob: 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.

Answer 2

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

• Barry Kaye: This will write odd numbers up to and inc. 49 not up to 100 as the OP asks.

Answer 3

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.