Sinclair QL User Manual

syntax:
example:
•
•
IF expression THEN
statements
[ELSE
statements]
END IF
100 LET limit; 10
110 INPUT "Type; n a number
ll
! number
120
IF number> Limit THEN
130 PRINT "Range error"
140 ELSE
150 PRINT "Inside limit"
160 END IF
In all three forms of the IF statement the THEN is optional. In the short form it must comment
be replaced by a colon to distinguish Ihe end of the IF and the start of the next statement.
In the long form it can be removed completely.
IF statements may be nested as deeply as the user requires (subject to available memory). nesting
However, confUSion may arise as to which ELSE, END IF etc matches which IF
SuperBASIC will match nested ELSE statements etc to the closest IF statement, for
example:
100IFa;bTHEN
110 IFc;dTHEN
120 PRINT "errorll
130 ELSE
140 PRINT "no error"
150 END IF
160 ELSE
170 PRINT "not checked
ll
180 END IF
The ELSE at line 130 is matched to the second IF. The ELSE at line 160 is matched
with the first IF (at line 100).
•
This sets the current ink colour, i.e. the colour in which the output is written. INK will
be effective for the window attached to the specified or default channel.
syntax: INK [channel,] colour
example: i. INK 5
ii. INK6,2
iii. INK #2,255
12/84
INK
windows

Sinclair QL Specifications

General

Processor	Motorola 68008
Clock Speed	7.5 MHz
RAM	128 KB (expandable to 640 KB)
ROM	48 KB
Operating System	Sinclair QDOS
Release Year	1984
Storage	Microdrive tape loop
Graphics	256x256 pixels, 8 colors
Ports	RS-232, ROM cartridge
Sound	Beeper (internal speaker)