For loop descending instead of ascending

Posted on 2003-10-27
Last Modified: 2008-02-07

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

Question by:stuart313
LVL 27

Accepted Solution

kretzschmar earned 100 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
use your loopvar within the loop

meikl ;-)
LVL 17

Assisted Solution

geobul earned 100 total points
ID: 9626642

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;
  y := 10;
  for x := 1 to 5 do begin

the loop counts from 5 downto 1. But:

var x: integer;
  for x := 1 to 5 do begin

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

Regards, Geo

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