Repeat until - Codea freezes

Questions
1

Hi there,

I am new to both Lua and Codea and just ran into a problem I cannot get my head around.

I am trying to use a repeat until loop to simply print the numbers 400 to 800. As soon as I execute that piece of code Codea freezes.
I get similar problems when using while loops.

Can anybody tell me whats going on? Thank you!

-- Use this function to perform your initial setup
function setup()
    -- Variables
    i = 400
end

-- This function gets called once every frame
function draw()
    -- This sets a dark background color 
    background(255, 255, 255, 255)

    -- Do your drawing here
    repeat
         print (i)
         i = i + 1
    until i == 800
end
2

The function draw is executed 60 times a second (ideally).

Your code sets up i to be 400 initially, then the first time it executes the draw function it increments i until it reaches 800. The second time the draw function is executed i is already at 800 fulfilling the requirement of your repeat until loop.

It’s not freezing, you just aren’t telling it to do anything else in the draw function

3

Thanks, but there is more code In the draw loop I should have posted earlier. When I said freeze, I was talking not reacting at all - I can’t even get back into the editor but have to manually close the app and restart.

Here is the whole code, just in case:


-- Use this function to perform your initial setup
function setup()
    -- Variables
    x = 900
    w = 150
    h = 100
    
    counter = 3
    parameter.watch("CurrentTouch")
    parameter.watch("x")
    
    th = HEIGHT - 20
    tw = WIDTH 
    tht = HEIGHT - 40
    i = 400
end

-- This function gets called once every frame
function draw()
    -- This sets a dark background color 
    background(255, 255, 255, 255)

    -- Do your drawing here
    repeat
         print (i)
         i = i + 1
    until i == 800

    
    fill(0, 0, 0, 255)
    font("MarkerFelt-Thin")
    text("Leben:", 40, th)
    text(counter, 80, th)
    
    lineCapMode(SQUARE)
    strokeWidth(5)
    stroke(0, 0, 0, 255)
    line(0, tht, WIDTH, tht)
    
    
    if CurrentTouch.state == BEGAN then
        fill(16, 178, 197, 255) 
    elseif CurrentTouch.state == MOVING then
        fill(255, 0, 0, 255)
    elseif CurrentTouch.state == ENDED then
        fill(210, 218, 16, 255)
    end

    sprite("Documents:fant", CurrentTouch.x, CurrentTouch.y, w, h)
    
    fill(255, 0, 110, 255)
    
    if x == 0 then 
        sound(SOUND_JUMP, 39249)
        x = x + 1
        else
            x = x - 1
            ellipse(x, 300, 100)
    end
    
    
    if x == CurrentTouch.x then
        sound(SOUND_EXPLODE, 6)
        counter = counter -1
       -- h = h - 10
       -- if h == o then
         --   h = 0
         --   w = 0
      --  end
    end
    
-- end function draw()  
end

Any idea?

4

You are doing the whole repeat the first time draw gets called. The second time draw gets called, i is greater than 800 and keep incrementing, so the repeat never stops, locking up draw.

5

Me slaps head! Got it, thanks for your patience :wink: