Athul Prakash (age 16 at the time) gave a logical idea for how to implement an OR test by negating the conditions in IF statements and then using the ELSE clause as the location to put the code that requires execution. I thought to myself that there are however two else clauses usually needed since he is suggesting using two IF statements, and so the executed code needs to be written twice. However, if a GOTO is used to skip past the required code, instead of writing ELSE clauses the code for execution only needs to be written once.

下面是一个可测试的例子，我将如何实现Athul Prakash的否定逻辑来创建一个OR。

在我的例子中，如果某人有坦克执照或者正在服兵役，他就可以开坦克。在两个提示中输入true或false，你将能够看到逻辑是否允许你驾驶坦克。

@ECHO OFF
@SET /p tanklicence=tanklicence:
@SET /p militaryservice=militaryservice:

IF /I NOT %tanklicence%==true IF /I NOT %militaryservice%==true GOTO done

ECHO I am driving a tank with tanklicence set to %tanklicence% and militaryservice set to %militaryservice%

:done

PAUSE

Athul Prakash (age 16 at the time) gave a logical idea for how to implement an OR test by negating the conditions in IF statements and then using the ELSE clause as the location to put the code that requires execution. I thought to myself that there are however two else clauses usually needed since he is suggesting using two IF statements, and so the executed code needs to be written twice. However, if a GOTO is used to skip past the required code, instead of writing ELSE clauses the code for execution only needs to be written once.

下面是一个可测试的例子，我将如何实现Athul Prakash的否定逻辑来创建一个OR。

在我的例子中，如果某人有坦克执照或者正在服兵役，他就可以开坦克。在两个提示中输入true或false，你将能够看到逻辑是否允许你驾驶坦克。

@ECHO OFF
@SET /p tanklicence=tanklicence:
@SET /p militaryservice=militaryservice:

IF /I NOT %tanklicence%==true IF /I NOT %militaryservice%==true GOTO done

ECHO I am driving a tank with tanklicence set to %tanklicence% and militaryservice set to %militaryservice%

:done

PAUSE

OR有点棘手，但也不过分。这里有一个例子

set var1=%~1
set var2=%~2
::
set or_=
if "%var1%"=="Stack" set or_=true
if "%var2%"=="Overflow" set or_=true
if defined or_ echo Stack OR Overflow

只有OR部分是棘手的，但对于一个包含NOT OR AND的普通布尔表达式，唯一好的解决方案是:

REM if A == B OR C == C then yes

(call :strequ A B || call :strequ C C) && echo yes
exit /b

:strequ
if "%1" == "%2" exit /b 0
exit /b 1

许多人似乎忽略了OR最明显的解决方案，即使用标签。

if "%a%" == "ONE" goto do_thing
if "%a%" == "TWO" (
   :do_thing
   echo a is equal to ONE or TWO
)

如果你需要else子句，你可以使用下面的语法:

AND:

if %v1% == a (if %v2% == b (echo yes) else echo no) else echo no

OR:

if %v1% == a (echo yes) else (if %v2% == b (echo yes) else echo no)