1.Previous
3.Next

(a value between and ) to the calling program. Most programs have a certain convention for their return codes (for instance, 0 for a successful execution).

If a program was invoked by , the internal IF command with its conditional can be used to test on error conditions of the last invoked external program.

Under , internal commands do not establish a new value.

Variables

Batch files for can have four kinds of variables:
* Environment variables: These have

1.Previous
3.Next