|
n2
n1 DO . LOOP
|
Loop n2-n1
times, maximum 65536 times but will always loop at least once. Index starts
with n1 and increments at LOOP each time
around.
|
|
n2
n1 DO . n3 +LOOP
|
Similar but
index increases by n3 each time giving a maximum number of loops of
INT((n2-n1)/n3)
|
|
BEGIN . f UNTIL
|
Loops until f is
true (non-zero).
|
|
BEGIN . AGAIN
|
Indefinite loop
used only as top level of hierarchy of software, such as the word entered at
power-up or the word executed by another task.
|
|
BEGIN . f WHILE . REPEAT
|
Most general of
loops. Circulates around BEGIN and REPEAT until f is
false, when execution jumps from WHILE to
after REPEAT .
|
|
n
IF . ELSE . THEN
|
Executes code
from IF to ELSE if
n is true, otherwise executes the code from ELSE to THEN .
|
|
RECURSE
|
Execute the
current word definition, occasionally preferable to loops.
|
|
CASE
w OF . ENDOF
|
Executes one of
many possible sections of
|
|
x OF . ENDOF
|
code. nx
represents possible value(s)
|
|
y OF . ENDOF
|
of n. cond is
any conditional such as
|
|
. (more if needed) .
|
> = or < . See example in WORD LIST, page 380.
|
|
DUP nx cond IFCASE . ENDOF
|
|
|
. (default if none of above) .
|
|
|
ENDCASE
|
|
