Bash - global variable?

[phosphide]

Hi

I'm trying to write a shell script using while read loop. The part that bothers me is this:

#!/bin/sh
n=0
echo abc | while read line ; do
	n=$[n + 1]
	echo $n
done
echo $n

When executed, it gives output as follows:

1
0

- the value of n outside the loop doesn't change. What should I do to make that variable global?

Thanks,
phosphide

[blinky]

#!/bin/sh
n=0
while read line 
do
    n=$((n + 1))
    echo "In loop $n"
done << MY_EOF
`ls`
MY_EOF

echo "at end $n"

replace `ls` with static text or whatever you need

[phosphide]

Works perfectly, thank you!