How to echo. only if previous line is not empty?

Question

How in my batch I can echo. ONLY if the previous line outputted is non-empty ? As you understood I want to avoid to have 2 /n/n

Answer 1

Write a function for echo, that remember if the last line was empty.

@echo off
call :func1
call :func2

:func1
call :echo "Func1"
call :echo ""
call :echo ""
exit /b

:func2
call :echo ""
call :echo "Func2"
exit /b

:echo
set "text=%~1"
setlocal EnableDelayedExpansion
if "!text!!last_line!" NEQ ""  (
  echo(!text!
)
endlocal
set "last_line=%~1"
exit /b

Output:

Func1

Func2