curriculum/1.solar-system/3.strings/01.the-message/index.md

type, title, xp, duration, difficulty

type	title	xp	duration	difficulty
challenge	The Message	50	25	2

The Message

[INCOMING — Mission Control, Earth]

Cadet, a string is a sequence of characters. You can pick any one out by its position (its index).

Indexes start at 0:

  M  I  S  S  I  O  N
  0  1  2  3  4  5  6

Negative indexes count back from the end. s[-1] is the last character.

Strings are immutable — you can read any character, but you can't change one in place. To "modify" a string, you build a new one.

Implement info(s) that returns a dict with four keys: first, sixth, last, length.

[END TRANSMISSION]

Your Task

Open starter/starter.py. Use s[0], s[5], s[-1], and len(s) to fill in the dict.

Objectives

• info("MISSION-CONTROL-7") returns {"first": "M", "sixth": "O", "last": "7", "length": 17}
• Works for any non-empty string of length ≥ 6