BASIC commands
PROGRAMMING MANUAL 85
Revision 3.0
3.2.124 FOR..TO..STEP..NEXT
/i
Type Program control command
Syntax FOR variable = start TO end [STEP increment]
commands
NEXT variable
Description The FOR ... NEXT loop allows the program segment between the FOR and
the NEXT statement to be repeated a number of times.
On entering this loop, the variable is initialized to the value of start and the
block of commands is then executed. Upon reaching the NEXT command, the
variable is increased by the increment specified after STEP. The STEP value
can be positive or negative, if omitted the value is assumed to be 1.
While variable is less than or equal to end, the block of commands is repeat-
edly executed until variable is greater than end, at which time program execu-
tion will continue after NEXT.
Note: FOR ... NEXT statements can be nested up to 8 levels deep in a BASIC
program.
Arguments • variable
A BASIC expression.
• start
A BASIC expression.
• end
A BASIC expression.
• increment
A BASIC expression.
• commands
One or more BASIC commands.
Example FOR opnum = 8 TO 13
OP(opnum,ON)
NEXT opnum
This loop turns on outputs 8 to 13.
Example loop:
FOR dist = 5 TO -5 STEP -0.25
MOVEABS(dist)
GOSUB pick_up
NEXT dist
The STEP increment can be positive or negative.
Example loop1:
FOR l1 = 1 TO 8
loop2:
FOR l2 = 1 TO 6
MOVEABS(l1*100,l2*100)
GOSUB 1000
NEXT l2
NEXT l1
FOR..TO..STEP..NEXT statements can be nested (up to 8 levels deep) pro-
vided the inner FOR and NEXT commands are both within the outer
FOR..TO..STEP..NEXT loop.
See also REPEAT..UNTIL, WHILE..WEND.
I52E-EN-03.book Seite 85 Freitag, 29. Juni 2007 11:55 11
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