Add two numbers without using addition operator | 5 methods

Given two numbers, add them without using addition operator.



Method 1: Use subtraction operator



Method 2: Repeated Addition/Subtraction using –/++ operator


Download   Run Code


13 -3 3


Method 3: Using printf()


This method make use of two facts –
1. We can use an asterisk (*) to pass the width precision to printf(), rather than hard coding it into the format string
2. printf() function return the number of characters printed on output stream.

We can also use %*c, ‘ ‘ in place of %*s, “”.


Method 4: Half adder logic



Method 5: Using logarithm and exponential function



Thanks for reading.

Please use ideone or C++ Shell or any other online compiler link to post code in comments.
Like us? Please spread the word and help us grow. Happy coding 🙂

Get great deals at Amazon

Leave a Reply

Notify of
Sort by:   newest | oldest | most voted
Daniel Sigurdsson
Daniel Sigurdsson

You have one more:

printf(“%gn”, log(exp(x)*exp(y)));