IBM 5100 Basic Reference Manual

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Notes About IF
• The expressions being compared within
the relational expressions must contain
data of
the same type (character or arithmetic).
• THEN and GOTO are interchangeable in
the I F statement. Either can be used,
but not both. GOTO is stored by the system.
• Comparison for equal must compare exactly
to 13 digits.
Example
The following examples show a variety
of IF statements:
30 IF A(3) =1= X+2/Z GOTO 85
40 IF R$ = 'CAT' GOTO 70
50 IF S2 = 37.222 GOTO 120
60 IF X>Y GOTO 90
70 IF A>BI C>O GOTO 110
80 IF A$ = 'JOB' & B$ = 'OATE' GOTO 100
In statement 40, for example, if character variable R$ contains the word CAT, pro·
gram control
is passed to statement 70. In statement 70, if either A> B or C> 0,
control passes to statement 110.
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IBM 5100 Specifications

General

Release Year	1975
RAM	16 KB - 64 KB
Storage	204 KB tape drive
Display	5-inch CRT
Operating System	APL/BASIC
Processor	IBM PALM (1.9 MHz)