Ul, ol, DL differences

1. UL is an unordered list. In other words, Li can be added without any restriction;
<Ul>
<Li> available </LI>
<Li> available </LI>
<Li> available </LI>
</Ul>
. Can be placed at will
. Can be placed at will
. Can be placed at will

2. Ol will be a sequence table, which will be arranged in sequence according to the Li you wrote;
<Ol>
<Li> I am the first </LI>
<Li> I am the second </LI>
<Li> I am the third </LI>
</OL>
1. I am the first
2. I am the second
3. I am the third

3. DL is the definition list, which defaults to the front-end hierarchical relationship;
<DL>
<DT> I am the header </DT>
<DD> content </DD>
<DD> content </DD>
</Dl>
I am the first
-- Content
-- Content