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HP -28S Manual Page 171

Advanced scientific calculator.
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The calculator recognizes these distinctions as you enter objects in the
command line. Pressing an operation key (such as
I
ENTER
I) always
causes execution of the operation. The current entry mode primarily
affects what happens when you press a command key (such as
I
STO
I),
a function key (such as G]), or a USER menu key.
Immediate Entry Mode. This mode is for entering numbers, lists,
and arrays. In Immediate entry mode:
• Pressing a command key executes the command line and then exe-
cutes the command.
• Pressing a function key executes the command line and then exe-
cutes the function.
• Pressing a USER menu key executes the command line and then
evaluates the corresponding name.
Algebraic Entry Mode. This mode is for entering names and
algebraics. If you begin the command line by pressing
~,
Algebraic
entry mode is automatically activated. In this mode:
• Pressing a command key executes the command line and then exe-
cutes the command.
• Pressing a function key writes the function's name in the command
line. If the function takes its arguments in parentheses, the opening
parenthesis is included.
• Pressing a USER menu key writes the corresponding name in the
command line.
Alpha Entry Mode. This mode is for entering strings and programs.
Pressing
.~
or
0
automatically activates Alpha entry mode and
turns on the
a
annunciator. In this mode:
• Pressing a command key writes the command's name in the com-
mand line.
• Pressing a function key writes the function's name in the command
line.
• Pressing a USER menu key writes the corresponding name in the
command line.
170
18: The Command Line

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