File Handling Operations

File Handling Operations

1. Open

   • Prepare the file
   • r Read only
   • W Write only
   • a Append
   • r+ or w+ Both read and write

2. Close

   • Close the file
   • Important because the open file uses memory
   • Gives the file a file handle then immediately closes it

3. Write

   • Allows the program to write to the file
   • If the file doesn't exist, it will be created
     • If it does exist, all data will be erased ready for the program to write to it

4. Write loop

   • Used instead of repeating the write command again and again
   • More efficient

5. Read

   • Converts the entire contents into a single string or array variable
     • The program can then search it to find the data it wants.

6. Read loop

   • An iteration loop (FOR or WHILE) can be used to read a file
   • The entire data can be read or only some