How can we create doctype in html5?

Related questions

1. Is doctype html important?
2. How do you know which HTML version I am using?
3. What is doctype XML?
4. What does doctype mean?
5. Does html5 need doctype?
6. What is the difference between HTML and html5?
7. What is doctype html?
8. What is SGML and DTD?
9. How do I know html5?
10. What is doctype in XML?

Tags

1. #proper
2. #document
3. #together
4. #xhtml
5. #template
6. #attribute
7. #pages
8. #html5
9. #polyglot
10. #markup
11. #following
12. #create
13. #declaration
14. #served
15. #another
16. #documents
17. #doctype
18. #below
19. #using