What is a public key in Bitcoin?

Related questions

1. How is Ripple different from Bitcoin?
2. Is Bitcoin better than Bitcoin cash?
3. How is ethereum different than Bitcoin?
4. What is a chain split?
5. Is Bitcoin and Bitcoin cash the same?
6. What is a Bitcoin cash hard fork?
7. What is forking github?
8. When was Bitcoin cash hard fork?
9. How many Bitcoins can ever be created?
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Tags

1. #string
2. #contains
3. #numbers
4. #letters
5. #addresses
6. #bitcoins
7. #receive
8. #private
9. #ensure
10. #owner
11. #address
12. #public
13. #spent
14. #generated
15. #allowing
16. #bitcoin
17. #randomly
18. #funds