You can use conditional logic flow statements based on return codes issued from previous command processing. These logic statements allow you to process your scripts based on the outcome of certain commands. You can use IF, EXIT, or GOTO (label) statements.
As each command is processed in a script, the return code is saved for possible evaluation before the next command is processed. The return code can be one of three severities: OK, WARNING, or ERROR. Refer to Administrator's Reference for a list of valid return codes and severity levels.