Commodore Plus 4 - Page 41

BASIC Version 3.5 Commands, Functions, and System Variables 29
Abbr. none
COS
COS (number)
COS is the numeric function that finds the cosine of the angle in parentheses.
The angle must be expressed in radians. For more information, see the Mathe
matical Calculations section of Chapter 3.
Parameter: any number or numeric expression
Examples: PRINT COS( tt)
-1
PRINT C0S(30*7r/180)
.866025404
DATA
DATA data list
Prints the cosine of an angle of n radians (180
degrees).
Prints the cosine of an angle of 30 degrees.
Abbr. dA
Contains a list of values that are available for assignment to variables by
READ commands. DATA commands are complements to READ commands;
neither command works without the other.
DATA items can be either numbers or text. Text data does not need to be
enclosed in quotes unless it includes an embedded comma or colon, although the
text items are treated as if they were in quotes. Since DATA commands always
contain constant values, not variable names, the computer assumes that any
nonnumeric DATA item is text.
DATA commands can contain any number of values as long as the list is no
longer than 88 characters on the screen. READ commands can get data from
DATA commands anywhere in the program.
You must have enough DATA values in a program to assign a value to every
variable in the READ commands that are executed in the program. If there are
not enough DATA values, the program is aborted and the error message OUT
OF DATA is displayed.
When DATA items are READ, the computer keeps track of the last value read
by marking its place with a data pointer. You can reREAD DATA items by using
the RESTORE command, which resets the data pointer to the beginning of a
DATA command.
Parameter: list of data values separated by commas
Example:
DATA items must be separated by commas. Text items do not have to be in
quotes unless they contain commas or colons.
10 DATA 1,2,3,4
20 READA,B
30 PRLKTT "A =";A;"B =";
READs the first two values from
the DATA list.