@echo off
:code
set /p "lineas=Ingresa un numero : "
if not defined lineas (goto:code)
set "string=*"
:loop
echo %string%
set "string=%string%*"
set /a "cont+=1"
if %cont% neq %lineas% (goto:loop)
set /p "="
exit /b 0

@echo off
setlocal enabledelayedexpansion
:code
set /p "lineas=Ingresa un numero : "
if not defined lineas (goto:code)
set "string=*"
for /l %%_ in (1, 1, %lineas%) do (
	echo !string!
	set "string=!string!*"
)
set /p "="
exit /b 0
 

@echo off
rem Piramide de 5 lineas.
for /l %%i in (1, 1, 5) do (
	for /l %%j in (1, 1, %%i) do (
		< nul set /p "=*"
		)
	echo.
)
pause>nul
exit /b 0