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**By: **IncludeHelp, **on ** 16 FEB 2017

Learn: How to find sum/addition of two integer number without using plus (+) operator in C, C++ programming language by using just a simple mathematics trick?

Hey, this is a cool trick to **find sum/addition of two integer numbers without using plus (+) operator in C and C++ programming languages?**

**Steps**

- Take two integer numbers
- Assign (input) values to them
- Subtract second number from first number (after making first number negative)
- Finally make negative their result

sum=(-a-b); sum=-sum;

**OR**

sum=-(-a-b);

**Example:**

Consider this example, here we are taking two integer variables a and b, assigning 10 and 20 to them and storing their addition in variable sum.

#include <iostream> using namespace std; int main() { int a,b,sum; a=10; b=20; sum=-(-a-b); cout<<"sum is: "<<sum<<endl; return 0; }

Output

sum is: 30

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