The various operands and combination of operands of the EXECIO command permit you to do many types of I/O. For example, you can use the EXECIO command to:

• Read information from a data set
• Write information to a data set
• Open a data set without reading or writing any records
• Empty a data set
• Copy information from one data set to another
• Copy information to and from a list of compound variables
• Add information to the end of a sequential data set
• Update information in a data set one line at a time