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2–8 The Automatic Memory Stack
File name 32sii-Manual-E-0424
Printed Date : 2003/4/24 Size : 17.7 x 25.2 cm
or
a
cancel that display and shows the X–register.
When viewing an equation,
a
displays the cursor at the end the
equation to allow for editing.
During equation entry,
a
backspaces over the displayed equation,
one function at a time.
For example, if you intended to enter 1 and 3 but mistakenly entered 1 and 2,
this what you should do to correct your error:
T
Z
Y
1
1
1
1
X
1
1
2
0
3
1
2 3 4 5
1. Lifts the stack
2. Lift the stack and replicates the X–register.
3. Overwrites the X–register.
4. Clears x by overwriting it with zero.
5. Overwrites x (replaces the zero.)
The LAST X Register
The LAST X register is a companion to the stack: it holds the number that was
in the X–register before the last numeric function was executed. (A numeric
function is an operation that produces a result from another number or
numbers, such as
<
.) Pressing
z
returns this value into the
X–register.
This ability to retrieve the "last x" has two main uses:
1. Correcting errors.
2. Reusing a number in a calculation.