Strange return codes of continue

[Roman Rakus]

This is realy strange. I have two examples
First:

while [ 1 ]; do
 while [ 1 ]; do
   continue 0
 done
done
echo $?

Second:

while [ 1 ]; do
 while [ 1 ]; do
   continue 0
 done
 echo $?
done
echo $?

In first case I have echoed 1. And I am expecting the same result in 
second case, but I get 0. Can anyone help me and say where is the 
difference?
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