Difference between container and container-fluid

container.html

<div class="container">
  <p> Conatiners: Are the one which have one fix width for each screen size.</p>
</div>

<div class="container-fluid">
  <p> container-fluid: expands itself to fill full width </p>
</div>

<!--CSS used internally in bootstrap for container class -->
<style>
@media (min-width: 568px) {
  .container {
    width: 550px;
  }
}
@media (min-width: 992px) {
  .container {
    width: 970px;
  }
}
@media (min-width: 1200px) {
  .container {
    width: 1170px;
  }
}
</style>