Parameters

A parameter is a value that is passed to a command or program to provide user input or control the actions of the command or program.

• Parameter values
  A parameter value is user-supplied information used during the running of a command.
• Parameters in keyword and positional form
  You can specify parameters in CL using keyword form, positional form, or in a combination of the two.
• Required, optional, and key parameters
  A command can have parameters that must be coded (required parameters) and parameters that do not have to be coded (optional parameters).
• Commonly used parameters
  This section contains the expanded descriptions of some of the parameters commonly used in the CL commands.
• Parameter values used for testing and debugging
  The operating system includes functions that let a programmer observe operations performed as a program runs.