| Open Mode |
Effect |
Effect with ...|ate |
| in |
Opens text files for reading, initial position at beginning of file |
Initial position is at end of file |
out
out|trunc |
Truncates file to empty, or creates file, for write only |
No effect on empty file |
| out|app |
Appends; opens or creates text file for writing at end of file |
No additional effect |
| in|out |
Opens file for update (read or write), with position at beginning of file |
Position is at end of file |
| in|out|trunc |
Opens file for update, truncates to empty |
No effect on empty file |