Appending Data
Appending data is a common process among Information Technology (IT) professionals because it allows programmers to continue building upon an existing file without deleting or removing previously stored data.
Appending information to a data file involves opening a data file for writing using the a attribute in an fopen() function and writing records or data to the end of an existing file.
If the file does not exist, however, a new data file is created as specified in the fopen() statement.