Input: Two integers. Preferably decimal integers, but other forms of numbers can be used. These can be given to the code in standard input, as arguments to the program or function, or as a list.

Output: Their sum. Use the same format for output integers as input integers. For example, the input 5 16 would lead to the output 21.

Restrictions: No standard loopholes please. This is , answer in lowest amount of bytes wins.

Notes: This should be fairly trivial, however I'm interested to see how it can be implemented. The answer can be a complete program or a function, but please identify which one it is.

Test cases:

1 2 -> 3
14 15 -> 29
7 9 -> 16
-1 8 -> 7
8 -9 -> -1
-8 -9 -> -17

Or as CSV:



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  • 26
    \$\begingroup\$ This is quite trivial, but not really simpler than, e.g., the Hello World catalog. Given that the ability to add integers is one of our two requirements for programming languages, I'd say it's worthwhile to have if properly specified. \$\endgroup\$ – Dennis Jul 2 '16 at 0:48
  • 1
    \$\begingroup\$ Can the answer take input with preceding zeros as default? e.g. 5 16 is inputted as 005 016 \$\endgroup\$ – FinW Dec 4 '16 at 11:56
  • \$\begingroup\$ @FinW Sure. As long as they don't get interpreted as octal. \$\endgroup\$ – dkudriavtsev Dec 4 '16 at 20:47

188 Answers 188


RTFM, 24 bytes

Btw, it's my first answer on PPCG.

041 x 041 y 070 010[x,y]
  • 1
    \$\begingroup\$ Welcome to the site! \$\endgroup\$ – Sriotchilism O'Zaic Dec 27 '18 at 15:13

Obx, 3 bytes

Obx is an abandoned language created by Phase in 2016.


With an input of 1 and 2, this program would output 3. Let's learn why.

+xy creates a function that adds x (the first argument) and y (the second argument). The last function created is called with whatever the input is.


Owk, 13 bytes

Owk is an abandoned language created by Phase.


This is written in an unofficial fork(but it's shorter):

  • 2
    \$\begingroup\$ What do you mean Owk doesn't support input? Don't you have lambdas? A lambda that takes variables as arguments and returns a value counts as valid input/output. Hardcoding two characters into your program is not. \$\endgroup\$ – Value Ink Sep 21 at 3:03

Seed, 11 bytes

4 141745954

Damn, It's quite small


Pepe 19 bytes


Try it not online but at the online interpreter

My first Pepe answer... made me want to reeeeeee (not reeally)

REee #Input first integer
rEee #Input second integer
REEEEEE #Add two integers
ReEE #Print result as integer

1+, 4 bytes


Pretty much trivial. I just want to get 1+ into those catalogue.


Racket 7 bytes

(+ a b)


(define (f a b)
  (+ a b)


(f 5 6)



Wireworld (Non-Competing)

This much answers, no wireworld? Man, Wireworld had these binary adders laying around from ages ago!

Where I got the binary adder

  • 8
    \$\begingroup\$ This could be improved if it was a full adder and if you included the cell count. \$\endgroup\$ – NonlinearFruit Mar 3 '17 at 22:50
  • \$\begingroup\$ Did you get around to implementing the top comment? \$\endgroup\$ – MilkyWay90 Jul 26 at 3:56

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