IAI America ASEL - Manual (Page 212)

Part 2 Programs
Chapter 3 Explanation of Commands
190
Part 2 Programs
z WH†† (Select if true; variable)
Command, declaration
Extension condition
(LD, A, O, AB, OB)
Input condition
(I/O, flag)
Command,
declaration
Operand 1 Operand 2
Output
(Output, flag)
Prohibited Prohibited WH††
Variable
number
Data CP
[Function] This command is used between SLCT and EDSL commands to execute the subsequent
commands up to the next W††† command or an OTHE or EDSL command when the
comparison result of the content of the variable specified in operand 1 with the value
specified in operand 2 satisfies the condition.
WH††
EQ Operand 1 = Operand 2
NE Operand 1 z Operand 2
GT Operand 1 > Operand 2
GE Operand 1 t Operand 2
LT Operand 1 < Operand 2
LE Operand 1 d Operand 2
[Example 1] LET 1 20 Assign 20 to variable 1.
LET 2 10 Assign 10 to variable 2.
:
SLCT Execute multi-branching.
WHEQ 1 10
:
(1)
(1) will be executed if the content of variable 1 is 10.
Since variable 1 contains 20, however, the next
condition will be referenced.
:
WHGT
:
1 *2 This command will be executed if the content of variable
1 is greater than the content of variable 2.
(2) Since variable 1 (= 20) > variable 2 (=10), (2) will be
executed.
OTHE
:
(3)
This command will be executed if none of the conditions
are satisfied. In this example, since (2) was executed,
(3) will not be executed.
:
EDSL
:
(4)
:
The processing will move here if any of the conditions
were satisfied and the applicable command executed. In
this example, (2) and (4) will be executed.
* If multiple conditions are likely to be satisfied, remember that the first W††† will become valid and any
subsequent commands will not be executed. Therefore, state from the command with the most difficult
condition or highest priority.