@echo off
for /l %%a in (1,1,9) do (
for /l %%b in (1,1,9) do (
for /l %%c in (1,1,9) do (
echo %%a%%b%%c>>1.txt
)
pause
%%1是變量名,變量名只能是壹個字.可為任意數字或字母;
/l是for裏的壹個遞增參數(初始值,遞增值,最終值)。