Float an element to the right with class pull-right.You can try to run the following code to implement the pull-right classExampleLive Demo           Bootstrap Example                                          Float to right          

To create the Dropdown menu with Bootstrap, use the .dropdown-menu class.You can try to run the following code to implement drop-down menu:ExampleLive Demo           Bootstrap Example                                                       Department                                                            IT                                        Marketing                                                           Finance                                                        Separated link                                

Dropdown menus are toggleable, contextual menus for displaying links in a list format. To use a drop-down, just wrap the drop-down menu within the class .dropdown.You can try to run the following code to implement the dropdown class in BootstrapExampleLive Demo           Bootstrap Example                                                       Subjects                                                            Java                                        Data Mining                                                           C++                                                                    Separated link                                

Use class center-block to set an element to center.You can try to run the following code to set the element to centerExampleLive Demo           Bootstrap Example                                                       Element at center                    

Hide an element to all devices except screen readers with the class .sr-only.You can try to run the following code to implement the sr-only Bootstrap −ExampleLive Demo           Bootstrap Example                                                                      Email address                                                        Password                                                

To hide content with Bootstrap, use the .hidden class in Bootstrap. You can try to run the following code to hide content:ExampleLive Demo           Bootstrap Example                                                       Content is visible.                                 Content is hidden.                    

To show content with Bootstrap, use the .show class in Bootstrap. You can try to run the following code to make content visibleExampleLive Demo           Bootstrap Example                                                       Content is visible.                                 Content is hidden.                    

Use class center-block to set an element to center.You can try to run the following code to implement the center-block classExampleLive Demo           Bootstrap Example                                          Float to right                                   Example for center-block                    

Float an element to the left with class pull-left.You can try to run the following code to implement the pull-left class −ExampleLive Demo           Bootstrap Example                                          Float to left          

The helper classes in Bootstrap include the pull-left,.pull-right, .center-block, and other classes.Let us see an example of .clearfix class −To clear the float of any element, use the .clearfix class −ExampleLive Demo           Bootstrap Example                                                       Quick Float to left                                 Quick Float to right