Simple example of batch processing if and goto

rem sets the date format to yyyymmdd

if %date%==20080806 goto doitrem If the time is equal to 20080806 jump to the designator doitrem If the time is not equal to, proceed to the next step.

notdoit

Echo time isn't up yet.

pause.

goto start

rem jumps back to the top.

doitrem This is the designator doit

rd d:\xx\ /s/q

The echo is over, the deletion is over.

pause.

ps: I used the batch processing that I wrote to delete a folder on a specified date as an example.

If and for are two powerful commands in batch processing, and I have a detailed description of them.

This sentence will give you a simple if

If is used to judge, and is a command to implement the branch.

echooffset

Pa = Enter a number:

if%a%gtr10

echo the number you entered is greater than 10

else(if

a%equ10(

echo you enter 10

elseecho

The number you entered is less than 10))).

pause and the goto command is to be executed in conjunction with the tag.

echooff:start

set pa=Please enter a character (q exit):

if/i%a%"=="q"

gotoendecho

You entered %a%.

gotostart

endpause

goto

Specify the jump to the tag, and when the tag is found, the program will process the command from the next line.

Syntax: goto tag name (tag name is a parameter that specifies the row in the batcher to which it is turned).

Goto generally appears with judgment.

An example is as follows:

set p a=Please enter a number:

rem prompts for a number, and reads the input.

if "%a%"=="1" goto 1

rem If the value of a is 1, it will be adjusted to the 1 tag to run. The next sentence will not be displayed.

echo is not 1

goto end

1echo input is 1

end

Because the script continues to execute the command that shows 2 after 1 is displayed, there will be a continuous display.

Please jump or truncate after the previous display ends.

Take a closer look at if ?should be able to grasp the writing of having an else clause or branch containing multiple lines.

@echo off

setlocal enabledelayedexpansion

clscolor 0a

menuecho big bag big bag big bag.

echo Please enter the serial number of the selected item:

set /p dx=

if "%dx%"=="1" goto id1

if "%dx%"=="2" goto id2

if "%dx%"=="3" goto id3

set dx=&goto menu

id1for /f "eol=d delims=" %%i in ( do >>echo %%i

set a=0

for %%x in (351850,352150,358140,358141,358142,358143,358144) do (

set /a a+=1

set x=%%x

echo dlc00!a!=!x!

goto end

id2for /f "eol=d delims=" %%i in ( do >>echo %%i

set a=0

for %%x in (352150,358140,358141,358142,358143,520520,520521) do (

set /a a+=1

set x=%%x

echo dlc00!a!=!x!

goto end

id3goto end

enddelrenstart .\

It's normal, you can't copy it directly and then leave it unmodified, because the directly copied will automatically have spaces added at the end of each line. So you have to delete, the following is the test screen, everything is fine.

@echo off

set n="%computername%"

if %n%=="wks001" goto 001

if %n%=="wks002" goto 002

if %n%=="wks006" goto 006

goto end

copy j: 001 account list. INI D: J: 001 OPPO script Y

Start J: 001 OPPO script

goto end

Copy J: 002 Account List. INI D: J: 002 OPPO script y

Start J: 002 OPPO script

goto end

copy j: 006 account list. ini d: j: 006 oppo script y

Start J: 006 OPPO script

goto end

copy j: 007 account list. ini d: j: 007 oppo script y

Start J: 007 oppo script

endpause

When using variables, you need to enclose them with %%, e.g. %n%Because variables are assigned with quotation marks, they should also be quoted when comparing. Determine that your machine name is in a fixed format based on your batch processing**, and if so, you can directly take the machine name as a variable.

** As follows: echo off

set "n=%computername%"

copy j: 3% account list. ini d: j: :3% oppo script y

Start J: %n: 3% oppo script

pause

Write exit on the line below the last if

If you don't terminate the if comparison, of course the order will continue to be executed!

Also, write exit on the line below each start and copy, otherwise the following command will be executed.

Anyway, you remember that as long as it's basic about the jump subcommand function, you need to terminate it unless you jump again.

if "conditions" then

The condition is true"

Execute this statement if the else condition is false"

endgoto "Line number or example number"

For example: if a=1 then

b=aelse

goto bbb

endbbb:b=c