TEX has its own way of breaking lines and pages and you can learn
about them by reading the TEXbook.
However, we have added three commands which are convenient.
The first command
nextline allows you to generate and
incomplete line.
For example, typing This is the way the world ends
nextline
produces
This is the way the world ends
Notice that TEX has not tried to space the words out to fill
the line the way it would have if you had typed
break.
The command
nextline is essentially the same as typing
hfil
break; it differs slightly in that it also
does some things about glue, but you don't have to know about that.
The command which forces TEX to break the page at will
is
endpage.
Typing this command forces TEX to start a new page
and at the same time it insures that even if the previous page
is not completely full of text the material will be spaced correctly.
The command with which you finish a paper, memo, letter, etc.,
is
bye.
This command tells TEX to complete the last page, print it and
then turn itself off, returning you to CMS.