Linux shell script heredoc example

I was just working on my Linux Teleport command (Linux cd command with a history), and ran across the code below, which essentially shows how to use a form of "heredoc" syntax in a Bash shell script. This approach uses the Linux cat command, but functions just like the heredoc syntax in languages like Perl.

Here's the source code I just came across:

function displayTpUsageStatement()
{
    cat <<'EOFFOE'

Usage:     tp [DIR]

Purpose:   Provide the same capabilities as the 'cd' command, but with a memory
           of directories that you have previously visited.

  -h       Show HELP (this output)
  -j PARTIAL-DIR
           JUMP to a directory found in your history (by partial directory name)
  -l       LIST the history of visited directories
  -n [NUM]
           Go to a directory by NUMBER. NUM corresponds to the number printed
           by the -l option. If NUM is not specified then a list of visited
           directories is shown and user can pick a number.
  -s DIR   SEARCH for and display a directory named DIR found in your history
EOFFOE

}

In this example, everything between this line:

cat <<'EOFFOE'

and this ending line:

EOFFOE

are echoed to the display when this function is called. As you can probably tell from the name of the function, this echoes a usage statement to the user of this command.

If you need to use a 'heredoc' in a Linux shell script (Bourne shell, or Bash script), I hope this example is helpful.