$? variable


 
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# 1  
Old 04-05-2001
Bug

So, I'm analizing UNIX sh script an I found $? variable at this moment I don't know what does it mean.

Anybody can help me whit this?

Thank you.

# 2  
Old 04-05-2001
$? contains the exit code of the last shell command issued. As I recall, it is usually 0 when the execution has no errors and non-zero upon errors (hopefully that's not backward). Example:

Quote:
#echo "hi"
hi
#echo $?
0
Quote:
$dlfjdlkfdjklfd
dlfjdlkfdjklfd: not found
#echo $?
1
 
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