What if you didn't know how big an island was, but you knew that somewhere, straight ahead, there was a row of flowers to be picked.
In the same way that Visual Basic allows a program to loop, Jeroo has a WHILE loop to repeat lines of code as long as a condition is met.
The high-level algorithm is: Keep hopping as long as it's clear ahead, then keep picking flowers as long as there are flowers ahead.
The actual code for a Jeroo named Jed is:
While Jed.isClear(AHEAD) Jed.hop() ' Keep hopping as long as it is clear ahead End While While Jed.isFlower(AHEAD) Jed.hop() Jed.pick() ' Keep picking flowers as long as there are flowers ahead End While
This could be changed into an original method that any Jeroo could use as follows:
Sub PickARow() ' Pick a row of flowers that is somewhere ahead While isClear(AHEAD) hop() ' Keep hopping as long as it is clear ahead End While While isFlower(AHEAD) hop() pick() ' Keep picking flowers as long as there are flowers ahead End While End Sub
Open GardenIsland and create the following 4 Jeroos and have them each pick a row of flowers as shown below using the PickARow method defined above. Predict what will happen BEFORE you run the program, then give it a try. the Garden island program as shown below is on P:\Jeroo\Programs