The HTML <ol> tag defines an ordered list. An ordered list can be numerical or alphabetical. An ordered list starts with the <ol> tag. Each list item starts with the <li> tag. The list items will be marked with numbers by default.
The <type> attribute of the <ol> tag, defines the type of the list item marker: Type Description
The list items will be numbered with numbers (default)
The list items will be numbered with uppercase letters
The list items will be numbered with lowercase letters
The list items will be numbered with uppercase roman numbers
The list items will be numbered with lowercase roman numbers
By default, an ordered list will start counting from 1. Use the start attribute to start counting from a specified number:
Lists can be nested (list inside list):