27.5 Using expressions in macros
§27.5.1 Understanding macro expressions
§27.5.2 Understanding operands and operators
§27.5.3 Displaying expression results in output
§27.5.4 Using control structures in expressions
§27.5.5 Specifying substrings in expressions
§27.5.6 Using list variables in expressions
§27.5.7 Using indirection in expressions
§27.5.8 Removing spaces from strings: an example
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