SAS(R) 9.2 Macro Language: Reference
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| Macro Expressions |
Introduction to Macro Expressions
There are three types of macro expressions: text, logical, and arithmetic. A text expression is any combination of text, macro variables, macro functions, or macro calls. Text expressions are resolved to generate text. Here are some examples of text expressions:
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&BEGIN
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%GETLINE
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&PREFIX.PART&SUFFIX
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%UPCASE(&ANSWER)
Logical expressions and arithmetic expressions are sequences of operators and operands forming sets of instructions that are evaluated to produce a result. An arithmetic expression contains an arithmetic operator. A logical expression contains a logical operator. The following table shows examples of simple arithmetic and logical expressions:
| Arithmetic Expressions | Logical expressions | |
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| 1 + 2 | &DAY = FRIDAY | |
| 4 * 3 | A < a | |
| 4 / 2 | 1 < &INDEX | |
| 00FFx - 003Ax | &START NE &END | |
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Copyright © 2008 by SAS Institute Inc., Cary, NC, USA. All rights reserved.
