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Numeric variables in gtroff are called registers. There
are a number of built-in registers, supplying anything from the date to
details of formatting parameters.
See Identifiers, for details on register identifiers.
| • Setting Registers: | ||
| • Interpolating Registers: | ||
| • Auto-increment: | ||
| • Assigning Formats: | ||
| • Built-in Registers: |