Hey guys,
If you are searching for how to comment in an XML file in the android studio then you are in right place.

THE SYNTAX OF COMMENTING IN XML

<!--HERE YOU CAN WRITE WHAT TO WANT -->
Let take an example using the comment in XML

You should write the tag outside the XML tag:
<RelativeLayout
       android:layout_width="match_parent"
       android:layout_height="wrap_content">

       <!--This is relative layout. -->

       <TextView
           android:layout_width="match_parent"
           android:layout_height="wrap_content"
       />
    </RelativeLayout>
WARNING OR POINT TO REMEMBER

You should not write comment inside the tag in XML:

<LinearLayout
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   <!--donot use comment inside the layout -->
/>