--- gforth/Attic/gforth.ds 1995/04/29 14:51:16 1.15 +++ gforth/Attic/gforth.ds 1995/06/03 14:24:42 1.16 @@ -409,6 +409,11 @@ doc-sm/rem @node Double precision, Floating Point, Mixed precision, Arithmetic @subsection Double precision + +The outer (aka text) interpreter converts numbers containing a dot into +a double precision number. Note that only numbers with the dot as last +character are standard-conforming. + doc-d+ doc-d- doc-dnegate @@ -419,6 +424,19 @@ doc-dmax @node Floating Point, , Double precision, Arithmetic @subsection Floating Point +The format of floating point numbers recognized by the outer (aka text) +interpreter is: a signed decimal number, possibly containing a decimal +point (@code{.}), followed by @code{E} or @code{e}, optionally followed +by a signed integer (the exponent). E.g., @code{1e} ist the same as +@code{+1.0e+1}. Note that a number without @code{e} +is not interpreted as floating-point number, but as double (if the +number contains a @code{.}) or single precision integer. Also, +conversions between string and floating point numbers always use base +10, irrespective of the value of @code{BASE}. If @code{BASE} contains a +value greater then 14, the @code{E} may be interpreted as digit and the +number will be interpreted as integer, unless it has a signed exponent +(both @code{+} and @code{-} are allowed as signs). + Angles in floating point operations are given in radians (a full circle has 2 pi radians). Note, that gforth has a separate floating point stack, but we use the unified notation.