i did not understand the different between the <outside and inside>

Answer 1

Taima Alfokaha hi,
What do you mean with <outside inside> ?
Do you have an example of code or something ?
Is this about list, like <ol> <ul> <li> ?

Answer 2

yes I meant the second one,about the list .

Answer 3

So, when you make a list you have choice,you can either make one with :
number -> ordered list-> <ol>
or with dot or other sign -> unordered list -> <ul>
These tags will indicate you start a list of the type ol or ul and they will be the container of your items, so inside (nested) you will put each item of your list -> <li>
So for example with an unordered list you'll have:

<h3>my list of tasks<\h3>
<ul>
<li>task 1</li>
<li>task2</li>
<\ul>

and your output will be:

my list of tasks
•task1
•task2

Is that answering your question ?