Commodore VIC-20 - Page 101

Chapter 3: Programming the VIC 20 Computer 87
column. Two DATA statements, each with a list of five data items, would
build exactly the same column. This may
be illustrated as follows:
10 DATA 10,20,30,40,50,60,70,80,90,100
First column entr
y
-{ 10
20
I 30
40
50
{
60
I
...-.--..
10 DATA 10, 20, 30, 40, 50
20 DATA 60, 70, 80, 90, 100
'-, V" ~ .,/
70
2 80
90
100
~ Last column entry
2
The first READ statement executed in a program starts at the first
column entry, assigning each value to corresponding variables named in the
READ statement. The second and subsequent READ statements take
values from the column, starting
at the point where the previous READ
statement left off. This may be illustrated as follows:
10 DATA 10,20,30,40,50,60,70,80,90,100
· 10
· {w
· /30
· A=lO 40
220 READ A, B, C B = 20 /it 50
· ~ /C=30 {60
· ~ 70
80
C=4O 90
~4O READ ~ / D = 50 100
· ~ A=60
· E= 70
: ~F:,80
490 READ A, E, F, G G- 90
500 READ B
~B=IOO