Usage: .\echo [OPTION]... [STRING]...

  -n              do not output the trailing newline
  -e              (unused)
  -E              disable interpolation of some sequences in STRINGs
      --help      display this help and exit (should be alone)
      --version   output version information and exit (should be alone)

Without -E, the following sequences are recognized and interpolated:

  \NNN   the character whose ASCII code is NNN (octal)
  \\     backslash
  \a     alert (BEL)
  \b     backspace
  \c     suppress trailing newline
  \f     form feed
  \n     new line
  \r     carriage return
  \t     horizontal tab
  \v     vertical tab