What is the difference between a shell variable that is exported and the one th

What is the difference between a shell variable that is
exported and the one that is not exported?

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What is the difference between a shell variable that is exported and the one that is not exported? ..

When we export the variable that will available in subshell
If simply define variable that is only available in current shell.
Example: #var=20
#echo $var
20
If you invoke #sh i.e subshell of bash and try to print that unexported variable valu you will not get that.
sh-2.05b# echo $var-----it does not print the valu of var b'caz still it is in bash shell memory.
Just see the exported variable in shell
[root@dhcppc0 root]# export var1=30
[root@dhcppc0 root]# sh
sh-2.05b# echo $var1
30
I hope you will be enjoy it.

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What is the difference between a shell variable that is exported and the one that is not exported? ..

Answer / mrinmoy

Only exported variables can be inherited by another program
while other variables can not be used.

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