while question

[idan72]

Hi,

I try to run the following code below that contain a while statement.
As you can see in the output it read each line in the file and echo it.
My question is why when I exit the while loop the value of the vars yyy and
f is undefined.

Thanks

cat junk.txt | while read yyy; do  echo $yyy ;export f=1 ; done ; echo
l-$yyy; echo f=$f ;
444
555
333
l-
f=
[ishai at mip-devtest ishai]$ cat junk.txt 
444
555
333
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