Multiple conditions

[crazyrdx]

If a variable OPCODE is "0000 0001" or "0000 0010" or " 0000 0011" or
"0000 0100" , then I wish to perform a certain action.

How can I do this ? Do I need to use if elsif elsif else, or case? Isnt
there an operator which allows me to put all of these in a single if?

thanks
rdx

 

[Mike Treseler]

crazyrdx wrote:

If a variable OPCODE is "0000 0001" or "0000 0010" or " 0000 0011" or
"0000 0100" , then I wish to perform a certain action.

How can I do this ? Do I need to use if elsif elsif else, or case? Isnt
there an operator which allows me to put all of these in a single if?

Yes. The "OR" operator.

if
(OPCODE = a) or
(OPCODE = b) or
(OPCODE = c)
then
do_certain_action;
end if;

-- Mike Treseler

 

[crazyrdx]

Thanks Mike!


rdx

 

Mike Treseler wrote:

crazyrdx wrote:

If a variable OPCODE is "0000 0001" or "0000 0010" or " 0000 0011" or
"0000 0100" , then I wish to perform a certain action.

How can I do this ? Do I need to use if elsif elsif else, or case? Isnt
there an operator which allows me to put all of these in a single if?

Yes. The "OR" operator.

if
(OPCODE = a) or
(OPCODE = b) or
(OPCODE = c)
then
do_certain_action;
end if;

It is also possible to use a case statement:

LABEL: case OPCODE is
when a | b | c => do_certain_action;
when d ....
when others ....
end case LABEL;

Regards,
Allan