bentham - 18 days ago 8

Java Question

I've got this statement in Java:

`System.out.println(3|4);`

Why is the output 7?

Answer

It's a bitwise OR operation. It's modifying things at a binary level.

```
011 3
in binary: | 100 in decimal: | 4
___ ___
111 7
```

Open Windows calc using scientific mode. You can flip between decimal and binary (and hex) and perform bitwise operations including or, and, xor, etc.

To do a bitwise or in your head or on paper, compare each digit of the same ordinal. If either number is a 1, the result at that ordinal will be 1.