For Saken

dw817 • 2019-08-22*2019-08-22 20:57* •

BBS>

PICO-8>Chat

function wait()
  repeat
    flip()
  until btnp(4)
end

function count()
  cls()
  for i=1,3 do
    print(i)
  end
end

i=6

count()

wait()

print("")
print(i)
print("")

wait()

for i=1,3 do
  print(i)
end

wait()

print("")
print(i)
print("done!")

repeat
  flip()
until forever

By looking at this code you would think the end result would be 4 each time, both in the function and in the main program as most programming languages would return that value. But this is not the case with PICO-8. Instead the result will be what you defined globally, in this case 6.

So it's important to remember that the index variable in ANY FOR/END statements, either directly in your main code or in a function - will ALWAYS be local to the loop.

So you need NEVER define LOCAL variables in a function that will only be used in FOR/END statements. Good to know.

Here is the cart for examination: