Accessing local variable

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# 1  
Old 06-09-2011
Accessing local variable


Would like to know the purpose and accessing of local variable as in below code snippet:

HTML Code:
( a=321; )	      

echo "a = $a"   #This will print 123
How to access local a variable which is assigned with value 321 ?. ..

# 2  
Old 06-09-2011
The short answer: Like this, you can't.

From the BASH man-page:
(list) list  is executed in a subshell environment

( a=321;
  echo "a = $a"   #This will print 321

# 3  
Old 06-09-2011
Okay. ..

Any purpose behind it?. .. Or it is like a dummy value assigned to some orbitery variable?.

Thank you.
# 4  
Old 06-09-2011
purpose willbe, If you want to do some calculation on same variable which is used by parent shell and don't want to replace the value of parent shell variable.
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