[CLOSED] Why is this happening?

Question

Saw this in a challenge question.

cout << (1 << 1)
Output: 2

I tried it again and...

cout << (1 << 2)
Output: 4

I was never taught this...

Answer 1

Left shift by one is equivalent to multiplication by two.

Answer 2

Martin Taylor Thank you! That makes sense now. I wish they could've put that SOMEWHERE, but that's ok. :)