Can I use DIV class and ID together in CSS?

Question

Can I use DIV Class and ID together in CSS? For example:

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Answer 1

Yes, in one single division you can use both but it's not very common. While styling you will call both so it will cause some ambiguity if you don't properly choose "x" and "y". Use # for ID and . for class. And for overall division you will either do separate styling or write: #x .y for styling purposes.