Explain various HTML list tags?

In HTML we can list the element in two ways:

1. Ordered list : In this list item are marked with numbers.

<ol><li> first item </li><li>second item </li></ol>

Display as:

1. First item
2. Second item.
3.  
4. Unordered Lists : In this item are marked with bullets.

<ul><li> first item</li><li>second item </li></ul>

Display as:

- First item

- Second item.