Apple IIe - Page 94

94 Apple lie Users Handbook
name is the name of the function. Like variable names, only the
first two characters are significant. The variable can be any real
numeric variable name. The expression can be a numeric
constant or a numeric equation.
Example
10 Pl= ATN(1) *4:REM Pl
20 DEF FNAR(X) =Pl * XA2
30 FOR RAD = 1 TO 3
40 PRINT RAD, FNAR(RAD)
50 NEXT RAD
60 END
]RUN [Ret]
1
2
3
3.14159266
12.5663706
28.2743339
In
line 10 , Pl is calculated so it can be used in the function
definition. In line 20, the function for the area of a circle is
defined. Line 40 then uses the function by passing the value of
the radius to the function. The value of the area of the circle is
then returned and printed by the PRINT statement.
•
Applesoft
DEL
• Integer
DEL deletes the lines given in the argument.
Configuration
DEL a [,b]*
a and bare integers greater than or equal to 0. In Applesoft, b
must be greater than a. In Integer BASIC, if bis less than a only
* The [,b] is only optional in Integer BASIC.