photonjl

::从1加到100的
@echo off
set str=0
for /l %%i in (1,1,100) do (
    set /a str+=%%i
)
echo %str%
pause>nul
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photonjl

::任意数值的计算
@echo off
set str=0
set /p var=input number

for /l %%i in (1,1,%var%) do (
    set /a str+=%%i
)
echo %str%
pause>nul
复制代码