printf "what is your name?"
read n
printf "hello %s" $n

# unset IFS then read in line
printf 'i love my country' | { IFS= read -r line; printf "$line"; }

# sometime i would like to read several lines without specify those lines
# <<OEF is called heredoc
# NOTE!! cannot run using sh ./cmd.sh You have to run in shell prompt and keyin on the cmd line
IFS= read var_input_from_stdin <<EOF # do it later (after heredoc finished), but only one line since read
i love my country
EOF
printf $var_input_from_stdin