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2-6 Math, Angle, and Test Operations
L
(negation,
·
) returns the negative of a number, expression,
or list. The narrow negation symbol (
L
) distinguishes negation
from the subtraction or minus (
–
).
L
value
EOS rules (Chapter 1) determine when negation is evaluated.
For example,
L
A
2
returns a negative number because squaring
is evaluated before negation. Use parentheses to square a
negated number,
(
L
A)
2
.
ABS
(absolute value,
2
P
) returns the absolute value of a
number, expression, or list.
ABS
value
Pi (
2
T
) is stored as a constant in the TI
-
80. Press
2
T
to copy the symbol
p
to the cursor location. The number
3.141592654
is displayed for
p
, but 3.1415926535898 is used
internally in calculations.
L
(Negation)
ABS
p
(Pi)