Visibility of a var outside a cycle

[salvomic]

hi,
I've a code like this one:

Code:


local j, m, tn;
...
FOR j FROM 1 TO m DO
...
tn:= tn + ∑LIST(DL(j));
END;
return tn^2;
...

now, tn is actually 1024 (i.e.), outside the FOR cycle "Return tn" give 1024, but "return tn^2) give 1449616 and not the right value (1048576); "return tn*2" give correctly 2048, "return tn*tn" give also 1449616...

How must I set the variable to give the correct value, also with tn^2 and so on, outside the cycle?

Thanks!

Salvo