HEREDOC

Bash Heredoc

In Bash and other shells like Zsh, a Here document (Heredoc) is a type of redirection that allows you to pass multiple lines of input to a command.

Simple heredoc

To create a heredoc and output the contents, you can use cat:

cat << EOF
The current working directory is: $PWD
You are logged in as: $(whoami)
EOF

Save the contents of a heredoc to a variable

If you need to save the contents of the heredoc to a variable, you can use the read command, which is also used to retrieve user responses into variables. source: stackoverflow.com

$ read -r -d '' input << 'EOF'
foo
bar
baz
EOF

$ echo $input

foo
bar
baz