PrintDbl

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     NAME
          Tcl_PrintDouble - Convert floating value to string

     SYNOPSIS
          #include <tcl.h>

          Tcl_PrintDouble(interp, value, dst)

     ARGUMENTS
          Tcl_Interp   *interp   (in)      Interpreter  that  controls
                                           the conversion.

          double       value     (in)      Floating-point value to  be
                                           converted.

          char         *dst      (out)     Where   to   store   string
                                           representing  value.   Must
                                           have        at        least
                                           TCL_DOUBLE_SPACE characters
                                           of storage.
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     DESCRIPTION
          Tcl_PrintDouble generates a string that represents the value
          of  value  and  stores it in memory at the location given by
          dst.  It uses %g format to generate  the  string,  with  two
          special  twists.  First, the string is guaranteed to contain
          either a ``.'' or an ``e'' so that it doesn't look  like  an
          integer  (where %g would generate an integer with no decimal
          point, Tcl_PrintDouble adds ``.0'').  Second, the number  of
          significant  digits  printed  at  dst  is  controlled by the
          tcl_precision  variable  in  interp;   if  tcl_precision  is
          undefined then 6 significant digits are printed.


     KEYWORDS
          conversion, double-precision, floating-point, string