Rasande: Windows Batch File If Then Else

Windows Batch File If Then Else

If exist productdat del productdat else echo the productdat file is missing. To delete the file productdat from the current directory or display a message if productdat is not found type the following lines in a batch file.

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If exist temptxt echo found else echo not found.

Windows batch file if then else. Batch file if else statement. Just like the if statement in batch script the if else can also be used for checking variables which are set in batch script itself. If exist fileext echo found remember to prevent batch files from getting lost when a file has spaces in the name add quotes.

Read this article to know details of exist and all the other batch file commands. There are two different methods of checking an errorlevel the first syntax if errorlevel. If the expression is zero then statement2 will be executed.

In the above scenario the statement1 will only be executed if the expression is non zero. Checking that a file or folder exists if exist temptxt echo found or the converse. If not exist temptxt echo not found both the true condition and the false condition.

Batch file if else example to check if a file or folder exists exist command is used to check if a file exists or not. The id command can check if a file exists dont exist and the same thing for seeing if a variable is defined. Command can be followed by the else command that will execute the command after the else keyword if the specified condition is false.

The second method is to use the errorlevel variable providing compatibility with windows 2000 or newer. The evaluation of the if statement can be done for both strings and numbers. Another useful situation where an if statement in a batch file is to check for the existence of a data file.

Provides compatibility with ancient batch files from the days of windows 95. The good news is dos has pretty decent support for ifthenelse conditions. If else is a selection statement that used to select statements depending on the value of a controlling expression.

A lot of times the batch job is just a monitoring tool that might be scheduled to check for new incoming data files in a specific directory. The else clause must occur on the same line as the command after the if.

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