Add sum without using any mathematical operators (#3473)

src/main/java/com/thealgorithms/maths/SumWithoutArithmeticOperators.java

@@ -0,0 +1,20 @@
+package com.thealgorithms.maths;
+
+public class SumWithoutArithmeticOperators {
+
+    /**
+        * Calculate the sum of two numbers a and b without using any arithmetic operators (+, -, *, /).
+        * All the integers associated are unsigned 32-bit integers
+        *https://stackoverflow.com/questions/365522/what-is-the-best-way-to-add-two-numbers-without-using-the-operator
+        *@param a - It is the first number 
+        *@param b - It is the second number
+        *@return returns an integer which is the sum of the first and second number
+    */ 
+
+    public int getSum(int a, int b){
+        if(b==0) return a;
+        int sum = a^b;
+        int carry = (a&b)<<1;
+        return getSum(sum, carry);
+    }
+}