printdbl(3) - Linux man page
Name
Tcl_PrintDouble - Convert floating value to string
Synopsis
#include <tcl.h> Tcl_PrintDouble(interp, value, dst)
Arguments
Tcl_Interp *interp (in)
Before │ Tcl 8.0, the tcl_precision variable │ in this interpreter controlled the │ conversion. As of Tcl 8.0, this │ argument is ignored and the │ conversion is controlled by the │ tcl_precision variable that is now │ shared by all interpreters.
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 one special twist: 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''.
Keywords
conversion, double-precision, floating-point, string