hello="hello, "
hello+=word
echo $hello

for ((i = 2; i > 0; i--)); do
   echo postfix dec $i
done
for ((i = 2; i > 0; --i)); do
   echo prefix dec $i
done
for ((i = 0; i < 2; i++)); do
   echo postfix inc $i
done
for ((i = 0; i < 2; ++i)); do
   echo prefix inc $i
done
