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AARM User's Guide
AARM Introduction Assembling Programs Operators Control Statements 
Macro Processor Standard Macro Processor 
Standard Macro Controls Defining Standard Macros Calling Standard Macros Local Symbols Exiting A Macro Built-in Macros REPT IRP IRPC Standard Macro Operators NUL Operator & Operator % Operator ;; Operator ! Operator C Preprocessor Exceptions Side-Effects Predefined Macros Examples Error MessagesStandard Macro Operators
Several operators are available that may be used in standard macros.
| Operator | Description |
|---|---|
| NUL | The NUL operator is used to determine if a macro argument is NULL. |
| & | The ampersand operator is used to concatenate text and parameters. |
| % | The percent operator is used to denote a macro parameter that is interpreted as an expression. |
| ;; | A double semicolon operator indicates that subsequent text on the line should be ignored. |
| ! | The exclamation mark operator is used to denote a literal character. |
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