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GNU Info (groff)Assigning FormatsAssigning Formats ----------------- When a register is used in the text of an input file (as opposed to part of an expression), it is textually replaced (or interpolated) with a representation of that number. This output format can be changed to a variety of formats (numbers, Roman numerals, etc.). This is done using the `af' request. - Request: .af ident format Change the output format of a number register. The first argument IDENT is the name of the number register to be changed, and the second argument FORMAT is the output format. The following output formats are available: `1' Decimal arabic numbers. This is the default format: 0, 1, 2, 3, .... `0...0' Decimal numbers with as many digits as specified. So, `00' would result in printing numbers as 01, 02, 03, .... In fact, any digit instead of zero will do; `gtroff' only counts how many digits are specified. As a consequence, `af''s default format `1' could be specified as `0' also (and exactly this is returned by the `\g' escape, see below). `I' Upper-case Roman numerals: 0, I, II, III, IV, .... `i' Lower-case Roman numerals: 0, i, ii, iii, iv, .... `A' Upper-case letters: 0, A, B, C, ..., Z, AA, AB, .... `a' Lower-case letters: 0, a, b, c, ..., z, aa, ab, .... Omitting the number register format causes a warning of type `missing'. Note: Debugging, for more details. Specifying a nonexistent format causes an error. The following example produces `10, X, j, 010': .nr a 10 .af a 1 \" the default format \na, .af a I \na, .af a a \na, .af a 001 \na The largest number representable for the `i' and `I' formats is 39999 (or -39999); UNIX `troff' uses `z' and `w' to represent 10000 and 5000 in Roman numerals, and so does `gtroff'. Currently, the correct glyphs of Roman numeral five thousand and Roman numeral ten thousand (Unicode code points `U+2182' and `U+2181', respectively) are not available. If IDENT doesn't exist, it is created. Changing the output format of a read-only register causes an error. It is necessary to first copy the register's value to a writeable register, then apply the `af' request to this other register. - Escape: \gI - Escape: \g(ID - Escape: \g[IDENT] Return the current format of the specified register IDENT (one-character name I, two-character name ID). For example, `\ga' after the previous example would produce the string `000'. If the register hasn't been defined yet, nothing is returned. automatically generated by info2www version 1.2.2.9 |