user interface - Left align and right align within div in Bootstrap

Question

What are some of the common ways to left align some text and right align some other text within a div container in bootstrap?

e.g.

Total cost                   $42

Above total cost should be left aligned text and $42 is right aligned text

Answer 1

2021 Update...

Bootstrap 5 (beta)

For aligning within a flexbox div or row...

• ml-auto is now ms-auto
• mr-auto is now me-auto

For text align or floats..

• text-left is now text-start
• text-right is now text-end
• float-left is now float-start
• float-right is now float-end

Bootstrap 4+

• pull-right is now float-right
• text-right is the same as 3.x, and works for inline elements
• both float-* and text-* are responsive for different alignment at different widths (ie: float-sm-right)

The flexbox utils (eg:justify-content-between) can also be used for alignment:

<div class="d-flex justify-content-between">
      <div>
         left
      </div>
      <div>
         right
      </div>
 </div>

or, auto-margins (eg:ml-auto) in any flexbox container (row,navbar,card,d-flex,etc...)

<div class="d-flex">
      <div>
         left
      </div>
      <div class="ml-auto">
         right
      </div>
 </div>

Bootstrap 4 Align Demo
Bootstrap 4 Right Align Examples(float, flexbox, text-right, etc...)

---

Bootstrap 3

Use the pull-right class..

<div class="container">
  <div class="row">
    <div class="col-md-6">Total cost</div>
    <div class="col-md-6"><span class="pull-right">$42</span></div>
  </div>
</div>

Bootstrap 3 Demo

You can also use the text-right class like this:

  <div class="row">
    <div class="col-md-6">Total cost</div>
    <div class="col-md-6 text-right">$42</div>
  </div>

Bootstrap 3 Demo 2