How to evaluate if an integer value is odd or even in Step7 SCL

[BNA]

That is not good way to write it, use ELSIF.

I Thought I did ???

If i write like this I can't compile

ELSIF INT_TO_BOOL(index)

But if I use this, It compiles

ELSE IF INT_TO_BOOL(index)

 

[TurpoUrpo]

I Thought I did ???

If i write like this I can't compile

ELSIF INT_TO_BOOL(index)

But if I use this, It compiles

ELSE IF INT_TO_BOOL(index)

What error did it give?

IF condition
THEN
    stuff;
ELSIF condition2
THEN
    otherstuff;
ELSE
    stuff if not any of above conditions is met;
END_IF;

Above is elsif structure. Below will be what u wrote, that is two nested if's.

IF condition
THEN
    stuff;
ELSE
    IF condition2
    THEN
        otherstuff;
    ELSE
        stuff if not any of above conditions is met;
    END_IF;
END_IF;

In this case it works the same, but its matter of "good code". Also in good programming practice is indentation to show "level" of instructions as shown above. It results in better readability of code.

 

[BNA]

Sorry, I forgot to remove the last "end_if", what happen the first 2 or 3 times I don't know, but now it compiles.