I need to delete a set of files in certain directories if there're older than a certain number of days. So I have a text file, with each line containing the directory & number of days.

The format is like this:
dirA,5
dirB,7

How do I write script to iteratively parse this text file & delete the files in the directories base on the number of days?

Any help to get started is appreciated!

not tested though!

awk -F"," '{ print $1, $2}' file | while read dir days
do
  find $dir -maxdepth 1 -type f -mtime +$days -name '*.*' -print | xargs rm -f
done

IFS=","
while read dir days
do
 if [[ $days -ge 7 ]]
 then
   echo $dir # rm -r $dir
 fi
done<file

I believe this would delete all the files and inclusive of subdirectories if there are any

and OP had requested only for deletion of files ( If am not wrong )

And moreover what about the case when days is less than 7 ?

You are right.It will all the files and its sub directories.

Just for example i am checking whether days is greater than 7.

Thanks both for the speedy replies. It certainly helped me get started!