![]() ![]() ![]() ![]() ![]() ![]() ![]()  | 
|||||
| 
 | 
|||||
| Streams: state tests | |||||
| Prerequisite Concepts | |||||
The state of a stream can be determined through the use of a modifiable is test. A stream can be tested to determine whether it is open or closed, as in:
is open or isnt open
is closed or isnt closed
| 
Prerequisite Concepts Arrays  | 
| ---- |