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
for ((i = 0; i < 2; i++)); do
echo postfix inc $i
for ((i = 0; i < 2; ++i)); do
echo prefix inc $i
# issue 215
echo $((((1)) << i))