CODEWITHSUNDEEP
turtle-graphics
user3275222
user3275222

Reputation: 223

Counting in Logo

I wish to write a simple procedure in the Logo programming language (Turtle), which does this process a number of times (the number of times can be an input of the procedure): generate a random number between 0 to 10. If the number is below 5, make the turtle red, if above/equal make it blue. In addition, I want to count the number of times the turtle was blue and to return the probability of a blue turtle.

My problem is mainly in assigning values to variables. I don't know how to create a counting variable in Logo and couldn't find it anywhere online. The part of counter = counter + 1, how do I do that in Logo?

Any help with this simple friendly procedure will be most appreciated ! :-)

Thank you.

Upvotes: 1

Views: 257

Answers (1)

cdlane
cdlane

Reputation: 41903

I don't know how to create a counting variable in Logo and couldn't find it anywhere online. The part of counter = counter + 1, how do I do that in Logo?

A common approach involves recursion:

to count :counter
  if :counter = 0 [STOP]
  pr :counter
  count :counter - 1
end

count 10

If you want to decrement (or increment) the counter directly, you can instead do:

to count :counter
  if :counter = 0 [STOP]
  pr :counter
  make "counter :counter - 1
  count :counter
end

count 10

I'm guessing Logo relies on tail recursion to optimize this approach to be as efficient as iteration.

Upvotes: 0

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