HP HP-18C - Naming a Formula; Shared User-Variables

Naming a Formula
Naming formulas helps you identify them later. Figure 9-7 shows a
formula list containing two named formulas and one unnamed for-
mula . The name precedes the formula; a colon separates the name
from the beginning of the formula .
Figure 9-7. Formula Names
~
PPSYXLXW~9=COST
PIANOS :PROFIT=PRICExQU
. DISCTPRICE :PRICExINVOI
mDllDIllmD
Formula names
To name a formula, type in the name before you type in the formula.
Separate the name from the formula with a colon ( : ). For example, to
enter the formula PRICE = INVOICE x DISCOUNT, and name it
DISCTPRICE, type:
DISCTPRICE : PRICE 0 INVOICE 0 DISCOUNT.
If you type in a formula without a name, you can add a name later
using the ... key .
Names can be any length and can include any characters except +,
-, x, -;-, ), (, <, >, "', :, =, and space.
Shared User-Variables
If two or more formulas contain the same user -variable, that variable
is
shared among the formulas in which it appears. For example, sup -
pose your formula list includes these two formulas named
CARPETPRICE and TOTALPRICE:
CARPETPRICE:PPSyxLxW+9=COST
TOTALPRICE:COST+HOURSX20.50=CHARGE
134 9: The Formula Solver