Atari 800 Basic Reference Manual

IF/THEN
18 Program Statements
10 PRHH
20 F'~:ItH :PRINT "ONE
11
30 PR nn "n.~r
40 P~: HH "THPEP
50 PRI~H "FOUP"
6f1 P~:nn "FI'..JE
11
65 GOTO 101:1
70 PF.:ItH "$$$$$$$$$$$$$$$$$"
:::0 P F.~ I r-~T II~-~~-~;-~~-~~-~~-~~-~~-~~·~~-~~ - ~~ - ~~-~~-~~-~~-~~-~"
90 F•k: I t·iT
11
???'??????:?????'?'?? n
95 Et-iD
1 fij F'F.: H-iT !! ~=;I:=-:: II
11(1 FtR I t·iT II ::;El.)Et ·f'
E'0 F'F.:It·H aEIGHF
130 F,F.: I f·~T II t·i1 t · ~E H
14(1 F)~~ I ~-iT !I TEf·~ II
150 GOTO 70
Figure 4-5. GOTO Program Listing
Upon execution, the numbers in the above listing will be listed first followed by
the three rows of symbols. The symbols listed on lines 70, 80, and 90 are ignored
temporarily while the program executes the GOTO 100 command. It proceeds
with the printing of the numbers "SIX" through "TEN ", then executes these -
cond GOTO statement which transfers program control back to line 70 . (This is
just an example. This program could be rewritten so that no GOTO statements
were used.) The program, w hen executed, looks like the follow ing:
Ot ·£
HID
Tl-f.:EE
FOUF.:
FI!..JE
~:;£1.,.1£ t · ~
EIGHT
t·HNE
THl
$$$$$$$$$$$$$$$$$
'?'??????'?' '?' ?''?'?'?'?' ? ??
Format:
Examples:
Figure 4-6. GOTO Program Run
IF aexp THEN { lineno }
statement [ :statement ... ]
IF
X = 100 THEN 150
IF A$ = " AT ARI " THEN 200
IF AA = 145 and BB = 1 THEN PRINT AA, BB
IF X = 100 THEN X = 0

Atari 800 Specifications

General

Brand	Atari
Model	800
Category	Desktop
Language	English