windows bat if then else
I'm having a hard time envisioning when ECHO would fail with a returned ERRORLEVEL not equal 0. I suppose it could fail if the output has been redirected to a file and the target drive is full. CptHammer has posted a good solution using ERRORLEVEL, al,Another one I've seen fairly often: if not %1} == }. And so on... The problem, as you can likely guess, is that the %1 is literally replaced with emptiness. It is not 'an empty string' it is actually a blank spot in your source file at that po
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 windows bat if then else 相關參考資料
Windows Batch Scripting: IfThen Conditionals - * steve jansen *
Both the true condition and the false condition: IF EXIST "temp.txt" ( ECHO found ) ELSE ( ECHO not found ). NOTE: It's a good idea to always quote both operands (sides) of any IF check... http://steve-jansen.github.io ifthenelse statements in Windows batch - Stack Overflow
I'm having a hard time envisioning when ECHO would fail with a returned ERRORLEVEL not equal 0. I suppose it could fail if the output has been redirected to a file and the target drive is full. Cp... https://stackoverflow.com Windows Batch Files: if else - Stack Overflow
Another one I've seen fairly often: if not %1} == }. And so on... The problem, as you can likely guess, is that the %1 is literally replaced with emptiness. It is not 'an empty string' it ... https://stackoverflow.com batch file - .bat If Then Statement - Stack Overflow
With else: @echo off IF EXIST newfile.txt ( del "InDesignData.txt" ren "newfile.txt" "InDesignData.txt" ) else ( echo Making tea ) ... (It's just not usually what I t... https://stackoverflow.com batch file - else if statement in Windows script - Stack Overflow
That is because %1 then evaluates to an empty string and thus the line reads if LSS 1900 (. which is invalid syntax. The problem here is that everything (because it's conceptually a single stateme... https://stackoverflow.com if statement - How to use if - else structure in a batch file ...
I think in the question and in some of the answers there is a bit of confusion about the meaning of this pseudocode in DOS: IF A IF B X ELSE Y. It does not mean IF（A and B) THEN X ELSE Y, but in fact ... https://stackoverflow.com IF... OR IF... in a windows batch file - Stack Overflow
Initialize a test variable containing a delimitted list of acceptable values, and then use search and replace to test if your variable is within the list. This is very fast and uses minimal code for a... https://stackoverflow.com windows - Batch script if else command - Stack Overflow
Try this: echo.%answer:~,1% | findstr /r /i "[e-h]" if %errorlevel% equ 0 ( format %answer:~,1%: /x /fs:FAT32 /v:FORENSICS /p:2 ) else ( echo Please provide a valid drive letter for flash d... https://stackoverflow.com Using multiple IF statements in a batch file - Stack Overflow
For this case, you could simply use a bunch of if / else statements, but that would result in a bunch of duplicated logic, and would not be at all clean if you had more than two files. A better way is... https://stackoverflow.com Batch file help! (if else then) and (set) - Microsoft
On Windows 7 (64 or 86) I get: OS Name: Microsoft Windows 7 Professional System Type: X86-based PC. The echo for "System Type" does not occur. My guess is there was a slight change in how yo... https://social.technet.microso |