The computer ignores these remarks; they merely serve to help pro-
grammers understand at a glance the way a program is working. You
may type them in or not, depending on whether you think you will
want them in the future.
We use the caret symbol (^) to indicate exponents. For example:
x =
Y^2
means let X equal Y raised to the second power. Some computer sys-
tems use an up-arrow (t), which prints as a left bracket ([) on FX
printers.
At the end of each chapter, a Summary section provides a concise
review of the chapter’s subject matter and a list of the control codes (if
any) that have been covered. For listings of the control codes in nu-
merical order and in functional groupings, see Appendixes B and C.
When we refer to an FX mode by name, we capitalize it:
Compressed Mode
Italic Mode
Pica Mode
Script Modes
and, for clarity, we capitalize such names even when the word mode
does not appear: Script characters and Italic print.
vi
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