Sum of Digits.

[Dieter]

(03-30-2016 05:37 PM)ggauny@live.fr Wrote:  May be I have bad understood your question ?

You said the corrected code starts with...

Code:

LBL'SDM'
ENTER
LOG
IP
9
-
10^X
/

This fills up any entered number with zeroes:
12345 ENTER LOG IP 9 – 10^x / yields 1234500000
123 ENTER LOG IP 9 – 10^x / yields 1230000000
etc.

This of course does not change the digit sum.

123 mod 9 = 6
1230000000 mod 9 = 6

1234 mod 9 = 1
1234000000 mod 9 = 1

So what is the reason behind this? As far as I can see the first six lines after the label are completely unnecessary. What am I missing here?

Dieter