What is FOR /F commonly used for in Windows batch scripting?

• A. The output of a command or the contents of a file
• B. A numeric counter with a fixed step
• C. Changing directory within a script
• D. Creating new environment variables

Answer: (A)

FOR /F is used to read text line by line from either the output of a command or the contents of a file, so you can process each line inside a loop. It captures the text, then you can assign it to a loop variable for further actions.

In practice, you can run a command inside the for clause and iterate over what that command prints, like for /F "options" %%v in ('someCommand') do something with %%v. You can also read a file directly by naming it, like for /F "options" %%v in (data.txt) do something with %%v. The options let you control how lines are split (delims) and which parts of the line you take (tokens); for example, delims= takes the whole line as one value, and tokens=1,2 lets you grab specific columns. If you need to handle quotes or spaces in file names, use the usebackq option.

This is why the correct choice fits: it describes using FOR /F to process the output of a command or the contents of a file.