@echo off & setlocal enabledelayedexpansion
for /l %%i in (1,1,100) do (
set /a m5=%%i %% 5
set /a m3=%%i %% 3
set s=
if !m5! equ 0 set s=!s!Fizz
if !m3! equ 0 set s=!s!Buzz
if "!s!"=="" set s=%%i
echo !s!
)