java | operator is for what?

Question

What is the output of this java code and why ?

 int a = 5 | 3 ;
 System.out.println(a);

Answer 1

This is a bitwise or.

I did not test it. But it must be 7.

101 -> 5
011 -> 3
----
111 -> 7

1|1 = 1
1|0 = 1
0|1 = 1
0|0 = 0