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Section 1: Getting Started 17
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The Owner’s Handbook
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Numbers shown in most examples and problems in this handbook are displayed
to four decimal places, like this
0.0000. As you will see,
numbers can be displayed in a variety of formats, but if you want the
HP-41C display to look like the ones shown on the next few pages, press
g
FIX 4 now.
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Keyboard
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Each key on the keyboard can perform several different functions. The
particular functions that are available on the keyboard depend on the status of
the calculator. If the HP-41C is in
‘‘normal’’ mode, that is not in PRGM, or ALPHA mode,
the available functions are the ones printed on the face of the key and
above the key.
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To select the function above the key, first press the
gold g
(shift) key, then press the function key.
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To select the function on the face of the key, simply
press the key.
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The character printed in blue on the lower face of the
key is only available in ALPHA mode. ALPHA mode is
covered in detail later.
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You can always tell when you have pressed the
g (shift) key; a
SHIFT annunciator in the display shows each time you press
g. The annunciator
turns off when the shifted function is executed or if you press
g again. The SHIFT
annunciator looks like this:
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Function Names
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When you press and hold down a function key momentarily, a name for that
function will appear in the display. When you hold the key down for longer
than about a half second,
NULL appears in the display.
This means that the function has been cancelled. By pressing and holding
a key you can look at the function name without actually executing the
function! For example, compute the reciprocal of 10.
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