Texas Instruments TI-80, Manual Book

Page: 54 / 235

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)