
# dtrace Command Operands <a id="dtrace_command_operands">

You can specify zero or more extra arguments on the `dtrace` command line to define a set of macro variables, such as `$1`, `$2`, and so on, to be used in any D programs that are specified with the `-s` option or on the command line.

**Parent topic:**[DTrace Command Reference](../reference/dtrace_command_reference.md)

