COMMENT ⊗   VALID 00004 PAGES
C REC  PAGE   DESCRIPTION
C00001 00001
C00002 00002	%\read16 to\pagenumber
C00003 00003	\answer According to the index, |\|\] is primitive but
C00004 00004	% now we print the answers, if any
C00005 ENDMK
C⊗;
%\read16 to\pagenumber
\input manmac
\tenpoint
\pageno=800
%\pageno=\pagenumber
\def\rhead{Experimental Pages for The \TeX book}
\def\chapno{ X}
{\catcode`\%=12 \immediate\write\ans{% Answers for galley proofs:}}
\answer According to the index, |\|\] is primitive but
|\|\<return> isn't. The command `|\def\↑↑M{\ }|' in
Appendix~B is what actually defines |\|\<return>, since a
return is representable as |↑↑M|. Asking \TeX\ to |\show\↑↑M|
\looseness-1
produces the response `|>| |\↑↑M=macro:->\|\]|.|'.

% now we print the answers, if any

% that blank line will stop an unfinished \answer
\immediate\closeout\ans
\vfill\eject
\ninepoint
\input answers
\bye