You know that you can use radio button when you want the user to select only one option from a set of options/alternatives. In the same way, if you want that the user can chose one or more options, you can use "checkbox" using the <input> tag making it's type equals to "checkbox".
It has three required attributes type, name and value. There are two optional attributes also and those are id and checked.
Syntax
Example
This will produce following result