Add two numbers without using add operator (i.e. Plus Sign)

Add two number without using + operator.

Algorithm:

1. Iterate till second operand is not zero (0)
   1. Compute sum_without_carry by xor operator
   2. Compute carry by and operator and one left shift
   3. Replace operand1 with sum_without_carry and operand2 with carry

Latest Source Code:
Github: AddWithoutAddOperator.java

Output:

 3 + 4 = 7
0 + 4 = 4
2 + 4 = 6
3 + 7 = 10
(-3) + (-7) = -10
3 + (-7) = -4
(-3) + 7 = 4