# Add two integer numbers using bit-wise operators in C

We can write solution for this problem in two way i.e.

1. Using recursive method
2. Using loop i.e. non-recursive method.

Here is the C program to perform sum of two numbers with the help of bit-wise operator using recursive method.

`/* Recursive method : Sum of two numbers using bitwise operators */#include<stdio.h>int sum ( int numFirst, int numSecond ){ if ( numSecond == 0 )      return numFirst; /* Recursive call of sum ( )*/  return sum ( numFirst ^ numSecond, ( numFirst & numSecond ) << 1 );}int main (){    int result = 0;   int numOne = 10;   int numTwo = 25;   result = sum ( numOne, numTwo );   printf ("The Sum of %d and %d is %d \n", numOne, numTwo, result);   return 0;}`

Here is the C program to perform sum of two numbers with the help of bit-wise operator using loop or non-recursive method.

`/* Non-Recursive method : Sum of two numbers using bitwise operators */#include<stdio.h>int sum ( int numFirst, int numSecond ) {    while ( numSecond != 0 )     {       int carry = numFirst & numSecond;       numFirst = numFirst ^ numSecond;       numSecond = carry << 1;    }    return numFirst; }int main (){  int result = 0; int numOne = 10; int numTwo = 25; result = sum ( numOne, numTwo ); printf ( "The Sum of %d and %d is %d \n", numOne, numTwo, result ); return 0;}`

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