Shell Programming and Scripting

Hi all
I have a problem with this var
I dont know why I cant get it ?!!?!
Im trying with

Code:

newvar1=$(($var+1))
newvar1=$(($var + 1))
newvar1=`expr $var + 1`

expr: syntax error
expr: syntax error
expr: syntax error

but it not work in other script its ok and working
tell me where is the problem pls?

Code:

awk  '/<iframe /{p=1} /<\/iframe>/{p=0; next}!p' |  while read myline; do

newvar1=${myline}

done
echo $newvar1

Thank you!!!

It's because of the pipe.

The while loop executes inside a subshell, and doesn't affect variables in the shell outside it.

What are you actually trying to do?

ok thank you !

I want to get all lines from the while loop to >> $newvar1

any ideas how to make it ?

And why are you trying to get all the lines from your while loop into newvar1?

What are you actually trying to do?

There may be more direct ways, is what I am thinking, if only I knew what you were actually doing. Usually feeding a single line through awk is a mistake.

ok
this is the full source code

Code:

echo "$result_get"|awk  '/<iframe /{p=1} /<\/iframe>/{p=0; next}!p' |  while read myline; do
then
newvar1=${myline}
fi
done
echo $newvar1

I just wanna give all the lines from while loop in $newvar1 to use it as a var for checking...

Thank you!

And why are you trying to get all the lines from your while loop into newvar1?

What are you actually trying to do? What is the function of that awk, there?

I am not diverting you or trying to be mean, the question is relevant. I don't actually know what your script does, so it's hard to help it, but the best way to allow the inside of the loop to set variables would be to remove that pipe.

Doing that means changing the logic of your program.

Changing the logic of your program means understanding your program.

Understanding your program means seeing what it's supposed to be doing.

Please explain.

Code:

awk  '/<iframe /{p=1} /<\/iframe/{p=0; next}!p'

this remove <iframe></iframe> tags from $result_get or inputfile

next I count the words in every line
and I want to get all the lines with more than 20 words
in one var outside the loop
thats all...
I will change the pipe .. thank you !