How to add multiple classes for ul element

Question

How do I add another ul class to this line:

 <ul class="sub-menu">

I tried to do like this:

<ul class="sub-menu"."insert">

But it didn't work...

Answer 1

Classes in HTML are space separated. so just write:

<ul class="sub-menu insert">

Answer 2

In HTML, classes are separated by space. So,

<ul class="sub-menu insert">

Answer 3

You dont need to have a dot between classes.

It will go like

<ul class="sub-menu insert">

just a space between the classes/