Echo off but messages are displayed

Question

I turned off echo in bat file.

@echo off

then I do something like this

...
echo %INSTALL_PATH%
if exist %INSTALL_PATH%(
echo 22         


        

Answer 1

Save this as *.bat file and see differences

:: print echo command and its output
echo 1

:: does not print echo command just its output
@echo 2

:: print dir command but not its output
dir > null

:: does not print dir command nor its output
@dir c:\ > null

:: does not print echo (and all other commands) but print its output
@echo off
echo 3

@echo on
REM this comment will appear in console if 'echo off' was not set

@set /p pressedKey=Press any key to exit