Question: I run a fortran code which writes data to a file. Then I run the code again and this time I want to write the data to the same file but without erasing the previously written data. What normally happens is the previous data is erased and only the new data is written in the file. Is there any command to add the new data to the previously written data?

Thank you

open(iunit,file='something',status='old',position= 'append') where iunit is your unit number