how to make multiple classes in html code example

Example 1: html add two classes

<a href="#" class="class1 class2">My Text</a>

Example 2: css multiple classes

//HTML Code
<div class = 'firstClass secondClass'></div>

//CSS Code
.firstClass.secondClass {
  
}

Example 3: how to write 2 class in html

<div class="nav nav-centered nav-reversed navbar navigation-block"></div>

Example 4: css assign multiple classes to one element

To specify multiple classes, separate the class names with a space,
e.g. <span class="classA classB">.
This allows you to combine several CSS classes for one HTML element.