How to use the read command in Bash?

Question

When I try to use the read command in Bash like this:

echo hello | read str
echo $str

Nothing echoed, while I think str<

Answer 1

Other bash alternatives that do not involve a subshell:

read str <<END             # here-doc
hello
END

read str <<< "hello"       # here-string

read str < <(echo hello)   # process substitution

Answer 2

Typical usage might look like:

i=0
echo -e "hello1\nhello2\nhello3" | while read str ; do
    echo "$((++i)): $str"
done

and output

1: hello1
2: hello2
3: hello3