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Tcl_PrintDouble(3tcl) Tcl Library Procedures Tcl_PrintDouble(3tcl) 





NAME


Tcl_PrintDouble - Convert floating value to string






SYNOPSIS


#include <tcl.h>

Tcl_PrintDouble(interp, value, dst)






ARGUMENTS



  
Tcl_Interp *interp (in)

  
This argument is ignored.

  
double value (in)

  
Floating-point value to be converted.

  
char *dst (out)

  
Where to store the string representing value. Must have at least
      TCL_DOUBLE_SPACE characters of storage.
    
    

    

  








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 one
    special twist: the string is guaranteed to contain either a
    “.” or an “e” so that it does not look like an
    integer. Where %g would generate an integer with no decimal point,
    Tcl_PrintDouble adds “.0”.


The result will have the fewest digits needed to represent the
    number in such a way that Tcl_NewDoubleObj will generate the same
    number when presented with the given string. IEEE semantics of rounding to
    even apply to the conversion.






KEYWORDS


conversion, double-precision, floating-point, string







  

    8.0
    Tcl