Basic set operation.

Question

x = {1,2,3} y ={2,3,4}. How could you get { 4} from x and y using basic set operation

Answer 1

print( y - x & y )

x & y will give common elements among them so

{2 , 3}

now y -{2, 3}

will remove the element {2, 3} from y

so

{4} is all that is left

Edit: print( y - x ) will also work as answered by HonFu

Answer 2

HonFu Oh! Totally forgot about that.

Answer 3

y-x