Android Question DO LOOP PROBLEM.

[sonistp]

dim d, sa as int
Do Until (sa-520)<0
d=d+1
sa=1400-(d*520)
Loop
Log(d)
Log(sa

expected result is sa=360 and d=2
but, i always got sa=0 and d=0

Anyone can help for my problem?

 

[John Naylor]

When you define your int's they default to 0 so you're straight away saying

Do until -520 < 0 which of course it is and the loop exits immediately.

[you should use the code option to display code by the way like this...]

    Dim d, sa As Int
    Do Until (sa-520)<0
        d=d+1
        sa=1400-(d*520)
    Loop
    Log(d)
    Log(sa)

 

[josejad]

EDIT: WRONG ANSWER, IGNORE

You should not use Do Loop anymore

DoEvents deprecated and async dialogs (msgbox)

Starting from B4A v7.0 the following warning will appear for DoEvents calls: DoEvents is deprecated. It can lead to stability issues. Use Sleep(0) instead (if really needed). The purpose of DoEvents was to allow the UI to be updated while the main thread is busy. DoEvents which shares the same...

www.b4x.com

 

[udg]

Hi José,
as you indicated it is DoEvents that was deprecated not Do Until loops. Too fast reading? It happens

 

[josejad]

as you indicated it is DoEvents that was deprecated not Do Until loops. Too fast reading?

Ups, you're right, sorry, edit

 

[Erel]

1. Moved to the questions forum.
2. Please use [code]code here...[/code] tags when posting code.

 

[sonistp]

 dim

When you define your int's they default to 0 so you're straight away saying

Do until -520 < 0 which of course it is and the loop exits immediately.

[you should use the code option to display code by the way like this...]

    Dim d, sa As Int
    Do Until (sa-520)<0
        d=d+1
        sa=1400-(d*520)
    Loop
    Log(d)
    Log(sa)

Thankyou for you answer really help me for this situation.
So, i must define value of sa after define the int of sa.

 

[John Naylor]

So, i must define value of sa after define the int of sa.

You don't *have* to define a value as an int gets set to 0 but it appears in this case you may want to.

You can combine the definition like this...

dim sa as int = 999 'or whatever value'

However your logic is flawed to get the results you are trying to achieve. Setting sa to anything above 520 will allow your loop to function but it will always result in an output where d = 0 and sa = whatever value you use. You should try stepping through your code (use the F8 key) to see what's happening line by line.