Texas Instruments TI-Nspire, Manual Book

Page: 448 / 876

436 Using Variables
Updating a variable
If you want to update a variable with the result of a calculation, you
must store the result explicitly.
Reusing the last answer
Each instance of Calculator automatically stores the last calculated result
as a variable named Ans. You can use Ans to create a chain of
calculations.
Note: Do not link to Ans or any system variable. Doing so could prevent
the variable from being updated by the system. System variables include
statistics results (such as
Stat.RegEqn
,
Stat.dfError
, and
Stat.Resid
) and
Finance Solver variables (such as
tvm.n
,
tvm.pmt
, and
tvm.fv
).
As an example of using Ans, calculate the area of a garden plot that is 1.7
meters by 4.2 meters. Then use the area to calculate the yield per square
meter if the plot produces a total of 147 tomatoes.
1. Calculate the area:
– On the Calculator entry line, type 1.7*4.2
,
and press
Enter
.
–
Handheld:
On the Calculator entry line, type 1.7
r
4.2
,
and press
·
.
2. Reuse the last answer to calculate the yield per square meter:
– Type
147/ans
,
and press
Enter
to find the yield.
–
Handheld:
Type
147
p
ans
,
and press
·
to find the yield.
Entry Result Comment
a := 2 2
a
3 8 Result not stored in variable
a
.
a
2
a := a
3
8 Variable
a
updated with result.
a 8
a
2
&
a
64 Variable
a
updated with result.
a
64