How to display a list inline using Twitter's Bootstrap

According to Bootstrap documentation of 2.3.2 and 3, the class should be defined like this:

Bootstrap 2.3.2

<ul class="inline">
  <li>...</li>
</ul>

Bootstrap 3

<ul class="list-inline">
  <li>...</li>
</ul>

While TheBrent's answer is true in general, it does not answer the question of how to do it in the official bootstrap way. The markup for bootstrap is simple:

<ul class="inline">
  <li>1</li>
  <li>2</li>
  <li>3</li>
</ul>

Source

http://jsfiddle.net/MgcDU/4602/

To complete Raymond's answer

Bootstrap 2.3.2

<ul class="inline">
  <li>...</li>
</ul>

Bootstrap 3

<ul class="list-inline">
  <li>...</li>
</ul>

Bootstrap 4

<ul class="list-inline">
  <li class="list-inline-item">Lorem ipsum</li>
  <li class="list-inline-item">Phasellus iaculis</li>
  <li class="list-inline-item">Nulla volutpat</li>
</ul>

source: http://v4-alpha.getbootstrap.com/content/typography/#inline

I couldn't find anything specific within the bootstrap.css file. So, I added the css to a custom css file.

.inline li {
    display: inline;
}

I Amazed, list-inline wasn't working in bootstrap 4 then finally i got it in bootstrap 4 documentation.

Bootstrap 3 and 4

<ul class="list-inline">
  <li class="list-inline-item">Lorem ipsum</li>
  <li class="list-inline-item">Phasellus iaculis</li>
  <li class="list-inline-item">Nulla volutpat</li>
</ul>

Source: http://v4-alpha.getbootstrap.com/content/typography/#inline

Bootstrap 5:

<ul class="list-group list-group-horizontal">
  <li class="list-group-item">An item</li>
  <li class="list-group-item">A second item</li>
  <li class="list-group-item">A third item</li>
</ul>

This solution works using Bootstrap v2, however in TBS3 the class INLINE. I haven't figured out what is the equivalent class (if there is one) in TBS3.

This gentleman had a pretty good article of the differences between v2 and v3.

http://mattduchek.com/differences-between-bootstrap-v2-3-and-v3-0/

EDIT - use CSS to target the li elements to solve your problem as below

    { display: inline-block; }

In my situation I was targeting the UL, instead of the LI

    nav ul li { display: inline-block; }

Inline is not actually the inline we maybe require - i.e. display:inline

Bootstrap inline as far as I observer is more of a horizontal orientation

To display the list inline with other elements then we do need

display: inline; added to the UL

<ul class="unstyled inline" style="display:inline">

NB// Add to stylesheet

According to the Bootstrap documentation, you need to add the class 'inline' to your list; like this:

<ul class="inline">
    <li>Item one</li>
    <li>Item two</li>
    <li>Item three</li>
</ul>

However, this does not work as there seems to be some CSS missing in the Bootstrap CSS file referring to the class 'inline'. So additionally, add the following lines to your CSS file to make it work:

ul.inline > li, ol.inline > li {
    display: inline-block;
    padding-right: 5px;
    padding-left: 5px;
}