Week 01 · Memory and the Missing Bug
Wednesday
The newest number wins
// A memory box holds one number
⏱ about 15 min
Swap the number!
Raven reads the auto-pilot program again.
She finds the height box two times.
One line sets height to 2.
A later line sets height to 5.
Which number is in the box now?
Rocket wants to guess. Raven wants to test.
WARM-UP: THE BOX REMEMBERS
- Read the program.
- Tap how high Nova flies.
set height to 3
spin around
fly up height
?
set height to 1
fly up height
?
One box, one number
A box holds only one number.
A new set line swaps it out.
The old number is gone.
set height to 2 set height to 5 say height
What do you notice?
After line one, the box holds 2.
Line two swaps in 5.
So Nova says 5.
WHAT IS IN THE BOX NOW?
- Read every line.
- Tap the answer.
set height to 1
set height to 4
?
set height to 6
set height to 3
say height
?
set height to 2
fly up height
set height to 5
?
Time to build!
Make Nova say 6.
Careful: there are two set cards.
MAKE NOVA SAY 6
- Read each card.
- Build it so Nova says 6.
1line 1
2line 2
3line 3
Nova keeps a logbook
set height to 2 set height to 5 say height
Swap the number when a set line runs.
| after line | box holds | true? |
|---|---|---|
| line 1 | 2 | ? |
| line 2 | 2 | ? |
| line 3 | 5 | ? |
The newest number wins!
A box holds one number.
A new set line swaps it.
A logbook tracks the box.
Great work, Crew!