Appendix A: Functions and Instructions 183
entry() CATALOG
entry() ⇒
expression
entry(
integer
) ⇒
expression
Returns a previous entry-line entry from the
Home screen history area.
integer
, if included, specifies which entry
expression in the history area. The default is 1,
the most recently evaluated entry. Valid range is
from 1 to 99 and cannot be an expression.
Note: If the last entry is still highlighted on the
Home screen, pressing ¸ is equivalent to
executing
entry(1).
On the Home screen:
1+1/x ¸
1
x
+ 1
1+1/entry(1)
¸ 2 ì
1
x+1
¸
1
2ø (2ø x+1)
+ 3/2
¸ 5/3ì
1
3ø (3ø x+2)
entry(4) ¸
1
x
+ 1
exact() MATH/Number menu
exact(
expression1
[,
tol
]) ⇒
expression
exact(
list1
[,
tol
]) ⇒
list
exact(
matrix1
[,
tol
]) ⇒
matrix
Uses Exact mode arithmetic regardless of the
Exact/Approx mode setting to return, when
possible, the rational-number equivalent of the
argument.
tol
specifies the tolerance for the conversion; the
default is 0 (zero).
exact(.25) ¸ 1/4
exact(.333333)
¸
333333
1000000
exact(.33333,.001) 1/3
exact(3.5x+y)
¸
7ø x
2
+ y
exact({.2,.33,4.125})
¸
{1à5
33
100
33à8}
Exec CATALOG
Exec
string
[,
expression1
] [,
expression2
] ...
Executes a
string
consisting of a series of Motorola
68000 op-codes. These codes act as a form of an
assembly-language program. If needed, the
optional
expressions
let you pass one or more
arguments to the program.
For more information, check the TI Web site:
http://www.ti.com/calc
Warning: Exec gives you access to the full
power of the microprocessor. Please be aware
that you can easily make a mistake that locks up
the calculator and causes you to lose your data.
We suggest you make a backup of the calculator
contents before attempting to use the
Exec
command.
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