The following batch file fragment compares an input line to wp and calls another batch file if it matches: input Enter your choice:%%option. If '%option' 'wp' call wp.bat. Batch files may be nested up to 64 levels deep. The current ECHO state is inherited by a called batch file. A batch file is a Windows file with the.bat extension. It's used as an input file for the command-line interpreter CMD to run a set of commands. This helps in automating things and reducing the.
From Microsoft Technet:
With batch files, which are also called batch programs or scripts, you can simplify routine or repetitive tasks. A batch file is an unformatted text file that contains one or more commands and has a .bat or .cmd file name extension. When you type the filename at the command prompt, Cmd.exe runs the commands sequentially as they appear in the file.
Batch File Names and Extensions
|.bat||This extension runs with MS-DOS and all versions of Windows|
|.cmd||Used for batch files in Windows NT family|
|.btm||The extension used by 4DOS and 4NT|
To understand the difference between
.bat please see here.
Avoid names which are already the name of built-in commands. like
tracert. There is a utility called
tracert.exe. So, avoid naming a batch file
Running Batch File
The easiest way to run a batch file is simply double-clicking its icon. Or paste the file full path into a command prompt, or just its name if command Prompt was started from the batch file directory, then enter.
Editing and Viewing Batch Files
Any ASCII editor can edit batch files. A list of editors that can syntax highlight batch syntax can be found here. You can also use the default notepad shipped with windows to edit and view a batch file, although it does not offer syntax highlighting.
To open notepad:
- Press Win 𐌎+R, type
notepadand then press Enter.
Alternatively, the most 'primitive' way to create a batch file is to redirect output from the command line to a file, eg.
echo hello world to the file
You can edit a batch file by right clicking the file and selecting 'Edit' from the context menu.
To view the contents of a batch file from within a command prompt, run the following command:
You can also start editing your batch file with notepad from the command prompt by typing
To get help on a batch file command you can use the built-in help.
Open a command prompt (whose executable is
cmd.exe ) and enter
help to see all available commands.
To get help for any of these commands, type
help followed by the name of the command.
Batch Files In Windows 10
Some commands will also display help if followed by
Help will only display the help for internal commands.
Opening a Command Prompt
The command prompt comes pre-installed on all Windows NT, Windows CE, OS/2 and eComStation operating systems, and exists as
cmd.exe , typically located in
On Windows 7 the fastest ways to open the command prompt are:
Press Win 𐌎, type 'cmd' and then press Enter.
Press Win 𐌎+R, type 'cmd' then then press Enter.
If you have an explorer window open, type 'cmd' in the address bar to open a prompt in the currently selected directory.
Right-click a folder in Explorer while holding Shift and select 'Open command window here'.
It can also be opened by navigating to the executable and double-clicking on it.
In some cases you might need to run
cmd with elevated permissions, in this case right click and select 'Run as administrator'. This can also be achieved by pressing Control+Shift+Enter instead of Enter when using way 1 of the points above.
I believe Batch files were available when the first IBM PC hit the market around 1980. They have evolved a little. Batch commands have changed to handle more options, a little more versatility has been added here and there. How come, after 28 years they are still around, and they don’t seem to be going away any time soon? Well, if the task to be performed is not large enough to write code in a compiled language, and not simple enough to do it manually, the batch file is the right answer! It’s fast to write, easy to understand (well, not always), and easy to change. They do have an expensive aspect, though. They are hard to tune up and get running right. A simple mistake can be very hard to find and correct: misspelling a label can result in the wrong execution path; a space in an assignment will result in the wrong assignment, a space in a file name can change execution fatally if the code is not solid. Yes, but with all their frailties and difficulties, we continue to use them.
So who uses batch files? Home users? maybe here and there for some repetitive tasks. But the main users are large companies. They are used in backup processes, in file purging processes, program installations (before setup.exe is ready for prime time), changing user permissions, preparing machines for special code runs, copying data, etc.
Batch Blog Batch Files File
Well, batch files can do many things, and be very powerful. Some batch files have thousands of lines of code. They can handle easily jobs which are more cumbersome in other languages, like starting and stopping services.
I will write about different aspects of batch files. Today, writing batch files is easier with the introduction of a very cool product: Running Steps. It’s a full featured debugger and code analyzer for batch files. It can cut your development time significantly. It will tell you about your mistakes before you need to dig into your code to find them because something is not executing right. The code analyzer will check your code as you type. It’s a syntax check, even though it goes beyond syntax. Let’s say, I have been programming in C# or C++ all day, and move on to change a batch file. I type the following line:
set MyVariable = new value
Looks fine at first sight, right? Weill, it’s not. Running Steps will display a wiggly line after the variable name. Both the variable name and the value have a space which may not be intended to be there. The variable name is ‘MyVariable ‘ (with a space at the end). Catching this type of issues during execution is a pain. The simpler the mistake, the harder it is to catch.
That is why having a tool to debug batch files is awesome. It will help identify problems before they execute. Running Steps will also allow me to step through my code, set breakpoints, watch/edit variable names, etc. Just what you would expect from a good debugger.
So, I invite you to check it out. You can find it at http://www.steppingsoftware.com . I will be writing more about batch files, common faults, cool programming practices (check some cool information in the ‘Batch File Coding’ forum Stepping Software has created), use of variables, common pitfalls, etc.
I guess this is a good starting point for a blog on Batch Files. Eventually cool tricks and techniques will be all found here.