@node vprintf, stdio @subheading Syntax @example #include #include int vprintf(const char *format, va_list arguments); @end example @subheading Description Sends formatted output from the @var{arguments} to @code{stdout}. @xref{printf}. @xref{vfprintf}. @subheading Return Value The number of characters written. @subheading Portability @portability ansi, posix