This is incorrect... as this statement will ALWAYS be true (a number is always going to be either >=1 or <= 19).
You probably meant to use && here, instead of ||.
if (n>=1 || num<=19) && (n%2!=0) {
You have the right idea, yes. But you need to enclose the entire condition in parenthesis.... and you'll want to fix that || issue. So this should work: