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About DOCTYPE
Title
Question
DOCTYPE is not a case sensitive right
Then why you told it should be in capital letters

HTML My-first-HTML-program 01-02 min 0-10 sec 16-06-21, 12:02 p.m. Vanikallesh

Answers:

Though it is not case sensitive, writing it in caps is the universal way.
You can write it in any way. 
28-06-21, 12:05 p.m. pravin1389


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