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value of variable hasn't changed after while loop


From: w3
Subject: value of variable hasn't changed after while loop
Date: Thu, 7 Nov 2002 17:46:51 +0800
User-agent: KMail/1.4.3

Hi,


Why can't I change the value of variable after while loop?

#!/bin/sh

A="cde"
cat /etc/passwd | while read line; do
  A="abc" && echo $A
done

echo $A

bash-2.05$ ./test.sh
abc
abc
abc
abc
abc
abc
abc
abc
abc
abc
abc
abc
abc
abc
cde <-- The value of $A hasn't been changed!

Is it a bash bug?

-- 
w3 <address@hidden>
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