@@x

The @@x statement is a variable representing an input argument for a macro. The number x is the number of the argument in the signature of the macro. So, @@1 represents the first input argument, @@2 represents the second input argument, and so on.

Syntax

@@x

Where x is the number of an argument in the signature of the macro.

Notes

Each @@x input argument variable can be used multiple times within a macro expansion.
The @@x argument variable can also be used with the @@S and @@SHx argument variables within a macro expansion.
The meaning of @@x argument variables does not change if an optional variable is not provided; for example, given the following macro signature,
```
create macro Sample.'@ADD'(single, optional, single) as '(@@1 + @@2 + @@3)';
```
and the following input parameters,
```
@ADD("New York", , Connecticut);
```
the argument variables would be set to these values:
```
@@1 = "New York"
@@2 = @_NULL
@@3 = Connecticut
```

Example

The following example shows a create statement for a macro with three input arguments that are added.

create macro Sample.'@SUM3'(single, single, single) as '(@@1 + @@2 + @@3)';