fstring have a format string
as their first argument (or second in the case of
next argument is mapped to fit the data type requested by the next
format entry in the format string. The last format entry is repeated as
needed to service all arguments (if there are more arguments than format
entries). There is no implied newline printed after treatment of the
argument list: A second
fprint starts printing where the first
one left off.
There is one format entry per argument, so all elements of an array are
printed with the same format entry. String arguments coupled with a
number format are printed as
0. Number arguments coupled with a
string format are not printed.
LUX accepts most legal C format strings. LUX format strings consist of
ordinary text, interspersed with format entries, which are made up of a
percent sign (
%), a modifier, the minimum field width, a period
.), the precision, and the argument type. All but the percent
sign and the argument type are optional. C escape sequences like
\n are handled properly (Escape Codes).
Each format entry comprises some plain text, a %-specification, or a %-specification with some following plain text, depending on the details of the %-specification.
The main differences between the LUX format strings and the C format
strings are that LUX but not C features the
%z formats and
modifiers, and that C but not LUX features
See also: Formatted Input/Output