how to convert this to for loop


can someone help me please

ctr=1
while test $ctr -le 20
do
tot=0
sctr=1
while test $sctr -le 4
do
echo -n "$ctr "
sctr=`expr $sctr + 1`
tot=`expr $tot + $ctr`
ctr=`expr $ctr + 1`
done
echo -n "$tot "
done

the output will show this
1 2 3 4 10 5 6 78 26 9 10 11 12 42 13 14 15 16 58 17 18 19 20 74

Indentation and [code] tags, please.

what do you mean by code tags...?? im using vi editor

I'm talking about BBCode tags whaen posting code in the forums.

Without code tags:

int main()
{
printf("Hello, world!");
return 0;
}

With code tags:

linux code tags.... in terminal

Have a look here to see which are available and how to use them: BB Code List

Seems to me that we should do your homework for you.

They have nothing to do with Linux or terminals. They are bulletin board markup.

yeah you right its actually my assignment... i`ve been trying it about more that 4 hours but still cant` get it i only can get the until result but cannot get the for result

Question 5
Write a shell script using for and until construct to display the following series:
1 2 3 4 10 5 6 78 26 9 10 11 12 42 13 14 15 16 58 17 18 19 20 74

Given script is using While Construct:
ctr=1
while test $ctr -le 20
do
tot=0
sctr=1
while test $sctr -le 4
do
echo -n "$ctr "
sctr=`expr $sctr + 1`
tot=`expr $tot + $ctr`
ctr=`expr $ctr + 1`
done
echo -n "$tot "
done

1. It's against the rules for us to do your assignments for you. You can read more about bash loops.

2. Do you still not understand [code] tags? When posting, just type "[code]" right before your code, and "[/code]" right after your code. The forum will nicely format it and preserve the indentation.

Moved: This thread is more suitable in Programming and has been moved accordingly to help your thread/question get the exposure it deserves.

What is your problem with this task, exactly? First you need to find out the rule for the output. Then, what have you tried?

Well this might point you in the right direction:

http://tldp.org/LDP/abs/html/loops1.html