echo

H:>date
The current date is: Mon 02/15/2010
Enter the new date: (mm-dd-yy)

H:>echo off
date
The current date is: Mon 02/15/2010
Enter the new date: (mm-dd-yy)
echo on

H:>echo hello
hello

H:>

Turns the command-echoing feature on or off, or displays a message.
Used without parameters, echo displays the current echo setting.

 http://en.wikipedia.org/wiki/Echo_%28command%29