Literal strings must be enclosed in double quotes (") or dollar signs ($). With eukleides, enclosing characters yield no difference but with euktopst dollar signs are taken as part of the string. Literal strings may be split in several lines.
%n
%r
%t
%"
%$
%%
length(s)
sub(s, i, j)
cat(
list)
printf
in C). Points are converted to their Cartesian
coordinates. With eukleides abscissa and ordinate are simply separated
by a white space. With euktopst coordinates are formated in the usual
mathematical way, using parenthesis and comma.