|Command||basic.readtl Statement/BASIC Program
Applicable release versions: AP
|Category||BASIC Program (486)|
|Description||reads a tape label and initializes the internal label storage area.
The "then" clause is taken if the operation is successful.
Either "else" or "onerr" can be specified, but not both. If the tape unit has not been attached or if an end-of-file (EOF) mark is read, the "else" or "onerr" clause, if present, is executed. In addition, the "onerr" statement can be used to check for end-of-tape (EOT), tape unit not ready, parity error, or block transfer error. See the system(0) function.
See the "then/else construct" for an explanation on the use of "then" and "else" clauses in statements that allow or require them.
|Syntax||readtl variable [then | else | onerr statement.block]|