Question

I was observing today that by writing the below line in a simple java class

System.out.println(010|4);

gives the output of ’12’ , whats the logic behind that, please advise.

Answer 1

| is the bitwise inclusive OR operator, 010 is octal for 8, which is 1000 in binary, 4 is 100 in binary, so when you or each bit in 1000 with the corresponding bit in 0100 you get 1100 in binary which is 12.