All right, it's time to wrap things up.

1. text = 'a' or text = "a" creates a string.
2. string[2] gets the third string character.
3. string[2:5] gets characters with the indices 2 (inclusive) to 5 (exclusive).
4. string[2:] gets all the characters starting at index 2.
5. string[-1] gets the last string character.
6. string[2:50:3] gets every third character from index 2 (inclusive) until index 50 (exclusive).
7. string[::-1] reverses the string.
8. \ escapes special characters, including itself.
9. + joins strings.
10. '-'.join(string_list) joins all elements in a string_list and separates them with a '-'.
11. if 'a' in string checks whether the string contains at least one letter 'a'.
12. for letter in string iterates over the string.

How about a short quiz now?