Batch files have been around since the early Windows operating system. These are plain text files with .bat .cmd .btm file extensions, and when executed, the commands are interpreted by the Windows command-line interface.
While Microsoft released a more advanced command-line tool called PowerShell (this is not installed by default), the native windows command line remains a popular choice for scripting. Here are some tips and tricks for developers and non-technical people alike:
Documentation is important, especially for very long batch files. However, during execution, these could clutter the display and can be difficult to read.
Its corresponding output is:
In its simplest form, batch files are straightforward in its sequential command execution. However, there are tasks that need error handling, either for notification or cleanup. The fall of the dungeon guardians - enhanced edition download free. Batch files, after executing a command, provides an error code called ERRORLEVEL. A non-zero value means an error has occured.
The abovementioned snippets would have the same behavior. ERRORLEVEL checks if the value is equal to or greater than the number specified.
The output of this would be:
Windows Batch File Error Handling Example
Do you copy files within your batch file? It is worth it to add a one liner command VERIFY ON, to perform a simple check of the destination file. The operation is not comprehensive, as it does not check if the file is corrupted. However, if you are transferring a lot of files (e.g. backups, migration), then this is a first step to ensure integrity of the operation.
The below program check even numbers and odd numbers. If a number is divided by 2, it means it is an even number. If the number is not divided by 2, then it is an odd number. @ECHO OFF set /a num=%1% SET /a mod=num%% 2 IF%mod% 0 ( ECHO%num% is even )ELSE ( ECHO%num% is odd ) How the above program works. If you do a lot of work in Windows batch files, the IF statement offers a very powerful way to add flexibility to your scripts. In this article you're going to learn about the five main types of IF statements you can use in a Windows batch file, how the correct syntax looks, and a realistic example for each.
Do you have other tips and tricks for creating Windows Batch Files? Comment on this page and will add it up to the list.
PushMon supports the use of Windows batch files. If you have batch files that are scheduled to execute at specific intervals, you can use PushMon to monitor its execution and notify you if something goes wrong. We have created a separate blog post on how to monitor your batch files using Windows task scheduler.
The batch script supports the conditional statements like if, if-else .etc. In this article, I will discuss how you can use if and else in the batch file.
You can see this article, Batch file commands
The if the statement is one of the selection statements. It uses to select statements depending on the value of a controlling expression.
In the above scenario, the statement will only be executed if the controlling expression is non-zero.
Let see an example,
The below script displays the message according to the argument enter by the user.
When User Enter 4:
When User Enter 6:
When User Enter anything except 4 and 6:
if else is a selection statement that used to select statements depending on the value of a controlling expression.
In the above scenario, statement1 will only be executed if the expression is non-zero. if the expression is zero, then statement2 will be executed.
Let see an example,
The below program check even numbers and odd numbers. If a number is divided by 2, it means it is an even number. If the number is not divided by 2, then it is an odd number.
1 Case:When you entered even number:
We know that the modular division of an even number by 2 is 0. So expression (num%% 2) return 0, as we know expression ( 0 0) return 1. Now controlling expression of if statement is non-zero then body associated with if statement will execute.
2 Case:When you entered an odd number:
For odd number expression (num %% 2) return 1, so expression ( 1 0) return 0. Now controlling the expression of if statement is zero then body associated with if statement will skip.