ECHO(1) General Commands Manual ECHO(1)
echo - echo arguments
echo [ -n ] [ arg ] ...
Echo writes its arguments separated by blanks and terminated by a new-
line on the standard output. If the flag -n is used, no newline is
added to the output.
Echo is useful for producing diagnostics in shell programs and for
writing constant data on pipes. To send diagnostics to the standard
error file, do `echo ... 1>&2'.