Add two numbers using bitwise operators in python

Python program for Add two numbers using bitwise operators. Here more information.

#  Python 3 program for
#  Add two numbers using of bitwise operators
class NumberAddition :
	#  Add two numbers
	def addition(self, a, b) :
		#  Display given numbers
		print("\n [(", a ,") + (", b ,")] ", end = "",sep = "")
		#  Auxiliary variable which are store the carry bit result
		carry = 0
		#  Executing loop, until b value is not zero
		while (b != 0) :
			#  Get carry bits of a & b
			carry = a & b
			#  Sum of bits of a ^ b
			a = a ^ b
			#  Shift the carry bit by one bit in left side
			b = carry << 1
		
		#  Display add result
		print(" : ", a, end = "")
	

def main() :
	task = NumberAddition()
	#  Test Case
	task.addition(8, 2)
	task.addition(5, 3)
	task.addition(-3, -5)

if __name__ == "__main__": main()

Output

 [(8) + (2)]  :  10
 [(5) + (3)]  :  8
 [(-3) + (-5)]  :  -8

Some special case this program are not work (such as addition( -6, 7),addition( 8, -2) etc).