basic.readtx

reads a tape record, converts it to hexidecimal, and assigns the value returned to a specified variable.

The length of the tape record is specified by the most recently executed 't-att' command.

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.