FOR IF Loop in javascript

Question

I have a simple question. I want to make an if statement in this code (if(i=2){str += 'test';}):

    var data = response.DATA;
    var str = '<ul>';
    for (var I = 0; I < data.length; I++) {
        str += '<li><a href="#blog?blog_id=' +  data[I][0] + '"data-transition="slide">' +      data[I][1] + '</a></li>';
 if(I=2){str += 'test';}
        }
    str += '</ul>';
    $('#output').html(str);
}

When I do, it's placing the word 'test' not only at row 2, but on every row.

if(I==2) or if(I===2), I=2 is assigning 2 to I...

Niccolò Campolungo
– Niccolò Campolungo

2013-06-21 07:10:52 +00:00
Commented Jun 21, 2013 at 7:10 — Niccolò Campolungo
– Niccolò Campolungo, Commented Jun 21, 2013 at 7:10

Denys Séguret · Accepted Answer · 2013-06-21 07:39:15Z

3

Use == or === to compare two values :

  if (I===2) {str += 'test';}

The result of I=2, which changes the value of I, is 2, which evaluates as true in an if.

edited Jun 21, 2013 at 7:39

answered Jun 21, 2013 at 7:10

Denys Séguret

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1 Comment

Christian Kellner Over a year ago

better use this === for also beeing sure the type is correct ;)

slebetman · Accepted Answer · 2013-06-21 07:11:59Z

1

You have a typo in your script:

if (I=2) ...

means that I is always 2 because you're assigning 2 to it.

answered Jun 21, 2013 at 7:11

slebetman

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