?
Solved

For loop descending instead of ascending

Posted on 2003-10-27
2
Medium Priority
?
1,214 Views
Last Modified: 2008-02-07
hi,

My problem is with a standard for loop, tried on different pcs, but it is counting down from 100 to 1 and not from 1 to 100.

What is the problem???

x : integer;

for x := 1 to 100 do
begin
   XXXXXXX
end


Thanks
0
Comment
Question by:stuart313
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 27

Accepted Solution

by:
kretzschmar earned 400 total points
ID: 9626617
thats just because the optimize-flag is set to on in the compileroptions and a descanding count is faster than an ascanding count

-> workarounds
-disable optimeizerflag
or
use your loopvar within the loop

meikl ;-)
0
 
LVL 17

Assisted Solution

by:geobul
geobul earned 400 total points
ID: 9626642
Hi,

You do not use 'x' variable inside the loop and the compiler optimizes your code for speed, i.e. 100 downto 1 is faster than 1 to 100. Example:

var x,y: integer;
begin
  y := 10;
  for x := 1 to 5 do begin
    ShowMessage(IntToStr(y));
  end;
end;

the loop counts from 5 downto 1. But:

var x: integer;
begin
  for x := 1 to 5 do begin
    ShowMessage(IntToStr(x));
  end;
end;

counts from 1 to 5. 'x' is used inside the loop.

Regards, Geo
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In this tutorial I will show you how to use the Windows Speech API in Delphi. I will only cover basic functions such as text to speech and controlling the speed of the speech. SAPI Installation First you need to install the SAPI type library, th…
Have you ever had your Delphi form/application just hanging while waiting for data to load? This is the article to read if you want to learn some things about adding threads for data loading in the background. First, I'll setup a general applica…
Add bar graphs to Access queries using Unicode block characters. Graphs appear on every record in the color you want. Give life to numbers. Hopes this gives you ideas on visualizing your data in new ways ~ Create a calculated field in a query: …
This tutorial will teach you the special effect of super speed similar to the fictional character Wally West aka "The Flash" After Shake : http://www.videocopilot.net/presets/after_shake/ All lightning effects with instructions : http://www.mediaf…
Suggested Courses
Course of the Month15 days, 14 hours left to enroll

743 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question