Atari XL User Manual

36
The Ateri XL Handbook
are carried out if the condition is met, otherwise
the program continues at the next line.
IF' ... THEN can also be used to control jumps:
10 PRINT
"WHAT NUMBER
AM I
THINKING
OF";
20
INPUT N
30
IF N <
>
3
THEN PRINT
"WRONG" : GOTO
10
40 PRINT "CORRECT!"
If the jump is the only instruction after THEN, the
word GOTO can be omitted:
10
DIM A$(20)
20
PRINT
"WHAT
AM
I";
30
INPUT A$
40
IF A$
=
"ATARI
XL"
THEN 80
50
PRINT:
PRINT A$;"? NO,
TRY
AGAIN"
60
PRINT
70
GOTO
20
80 PRINT: PRINT "GOOD GUESS!"
Variables can be used to direct a GOTO command:
10 JUMP = 40
20
GOTO JUMP
30 PRINT "THIS LINE IS MISSED"
40 PRINT "JUMPS TO HERE"
EXAMPLE PROGRAM - SORTING NUMBERS
As an example of what can be done using loops and
decisions, here is a program which sorts ten
numbers into ascending order.
10
REM
SORTING PROGRAM

Atari XL Specifications

General

Brand	Atari
Model	XL
Category	Desktop
Language	English