For more advanced Batch scripting topics, please grab a copy of the Batchography book.
Let’s get started!
In Batch files, to open and read files, you have to use the FOR /F switch which is usually used to tokenize the input it receives.
Here’s the specific FOR /F syntax needed to read the Batch files line by line:
@echo off for /f "delims=" %%a in (the-file.txt) DO ( ECHO Line is: %%a )
Replace the variable name “a” and the input text file “the-file.txt” with your file and variable name.
Let’s see the contents of the-file.txt:
Line 1 Line 2 Line 4 Line 5, ...
Note how line 3 is left intentionally blank. Now let’s run the script and observe the output:
C:\Batchography>read-line-by-line.bat Line is: Line 1 Line is: Line 2 Line is: Line 4 Line is: Line 5, ... C:\Batchography>
Did you notice something missing? Yes, line 3 is not displayed and that’s because empty lines are skipped by design.
Now that you can read lines from a text file, what about parsing INI files in the Batch language?
That’s it for this article but not everything regarding the powerful FOR /F switch and its tokenizing capabilities, stay tuned!You might also like:
- Parsing INI files from a Batch file
- Batchography: Converting numbers to characters (or the CHR() function)
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