Problem 8. Add two numbers

Created by Cody Team

Solve Later

{"relationships":[{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/document","relationshipId":"rId1","target":"/matlab/document.xml"},{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/output","relationshipId":"rId2","target":"/matlab/output.xml"}],"parts":[{"partUri":"/matlab/document.xml","relationship":[],"contentType":"application/vnd.mathworks.matlab.code.document+xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\"?><w:document xmlns:w=\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\"><w:body><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Given a and b, return the sum a+b in c.</w:t></w:r></w:p></w:body></w:document>"},{"partUri":"/matlab/output.xml","contentType":"text/xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\" ?><embeddedOutputs><metaData><evaluationState>manual</evaluationState><layoutState>code</layoutState><outputStatus>ready</outputStatus></metaData><outputArray type=\"array\"/><regionArray type=\"array\"/></embeddedOutputs>"}]}

Solve

Solution Stats

63437 Solutions
34177 Solvers

Last Solution submitted on Sep 26, 2022

Last 200 Solutions

Problem Comments

49 Comments

49 Comments

Show 46 older comments

Ahmed on 7 Mar 2013

A quick easy start! xD

Sabarinathan Vadivelu on 5 Dec 2013

I tried. But caught with error.

Natan on 7 Dec 2013

it is very easy to abuse the solution map by writing a correct solution with a lot of useless code before it. I tested this and got the solution map rescaled to absurdity (and I see I'm not the only one). Please correct this.

Prita Vaidya on 30 Nov 2015

Easy start...

Adi Zabidi on 27 Dec 2016

1st try :)

Nadhirah Nordin on 28 Dec 2016

great

TAYALAN SIVALINGAM on 28 Dec 2016

good job

Abubaker SHERIF on 29 Dec 2016

nice q

Gerard Chen on 30 Dec 2016

nice

Ujean H. Krahbs on 3 Oct 2017

I did it

Mohamed Atyya on 30 Oct 2017

good

Garion Caponsacco on 27 Nov 2017

so fun!!!!!!

Quentin Roy-Foster on 30 Nov 2017

nice

Rob Williams on 11 Apr 2018

Good one.

Pranav Jonnavithula on 21 Feb 2019

quick and easy start

0gihci on 26 Feb 2019

nice

Kamran Shafi on 2 Jun 2019

Easy Start

Manfred Germain on 3 Aug 2019

function c = addo(a,b)
c= a+b;
end

%I did the above, Why does it say it's wrong?

Fakhteh Ghalami on 8 Nov 2019

c=a+b

Longyue Wang on 13 Feb 2020

Oier said it's really rudimental!

sainithin artham on 6 Apr 2020

function sum
c=a+b;
end

Jyothsna Chintala on 21 Apr 2020

good

Brijesh M S on 5 Jun 2020

just to appreciate the moment that there are 69 likes for this simple question

Fatih KIRCI on 7 Jun 2020

c=a+b

Mert Ceyhan on 12 Jun 2020

good

qwerty qwerty on 23 Oct 2020

a=given value;
b=given valve;
c=a+b;
display('the ans c is',num2str(c));

Griffen Josephs on 13 Nov 2020

cool

Nicholas Bitler on 26 Nov 2020

straight forward, warm up question

Thomas Perun on 4 Dec 2020

Very easy! Great warm-up

Nathaniel George on 7 Dec 2020

My favorite problem

Cory Cunningham on 11 Dec 2020

got it

Cory Cunningham on 11 Dec 2020

good intro problem

Ryan Yang on 11 Dec 2020

I like this problem

Richard Karapandi on 12 Dec 2020

great way to start

CALEB SWEITZER on 13 Dec 2020

easy

Matthew Moliassa on 24 Mar 2021

Good problem

Jacob Berry on 2 May 2021

Very nice

Muhammad Umer on 13 Aug 2021

hey, could you tell me where is the command window to solve this problem?
how to solve these problems.

Hamda Eissa HCT2022 on 12 Oct 2021

easy

Ian Balaratna on 6 Dec 2021

Simple

Colin McNicholas on 13 Dec 2021

Very simple

Aditya Khanna on 3 Mar 2022

easy!

Catherine Coyle on 24 Mar 2022

easy

Jessica Portman on 5 Apr 2022

easy

shalom kobi on 17 Apr 2022

how does Matlab calculate the size of the solution?

Ty Sheloski on 1 May 2022

easy

Joshua McMellon on 2 May 2022

light wrok #weightroom

Sumedha Gajanan Pol on 3 May 2022

hardest one on here

Mary on 11 Jul 2022

Nice question!

Solution Comments

Solution 8700610

1 Comment

1 Comment

Mohammed on 12 Jul 2022

Easy

Solution 7403045

1 Comment

1 Comment

Abhay Singh Rana on 19 Jan 2022

This is the solution with the smallest size I don't know why they don't agree

Solution 7138395

1 Comment

1 Comment

John Palladino on 10 Dec 2021

a little tricky

Solution 6804790

1 Comment

1 Comment

Josh Klueber on 2 Nov 2021

This is a good starter problem, I was kind of confused by the function file though at first since you can't see the script

Solution 5198776

1 Comment

1 Comment

Isabella Stellitano on 26 Oct 2021

GOOD

Solution 5103207

Solution 5103107

Solution 4147825

1 Comment

1 Comment

Fabio BONORETTI on 11 Dec 2020

just for example
a=1
b=2
c=a+b

output c=3

Solution 4142510

1 Comment

1 Comment

John Hackenberg on 11 Dec 2020

wow amazing problem, very challenging

Solution 3029206

1 Comment

1 Comment

Tatjana Dulinskiene on 2 Oct 2020

I like this task :)

Solution 3012955

1 Comment

1 Comment

Anantha Krishnan R on 1 Oct 2020

very easy

Solution 2876582

2 Comments

2 Comments

david stewart on 25 Aug 2020

I like the approach these questions take. It is helping me understand some parts of Matlab I have had issues with in the the past.

Madeline Infante on 22 Sep 2020

good job guys

Solution 2828757

1 Comment

1 Comment

Sheikh Iftekhar Ahmed on 13 Aug 2020

A very good starting problem on functions

Solution 2257572

1 Comment

1 Comment

Rohit Bisht on 6 May 2020

easy right now

Solution 1957977

1 Comment

1 Comment

Mohammad Alam on 3 Oct 2019

bingo!!!

Solution 1928827

1 Comment

1 Comment

Nhat Lam Nguyen on 10 Sep 2019

good

Solution 1915445

1 Comment

1 Comment

Malcolm Wildgoose on 29 Aug 2019

Nice!

Solution 1891250

1 Comment

1 Comment

Manfred Germain on 3 Aug 2019

Why is this wrong here? I checked using matlab on my laptop and it works.

Solution 1272668

2 Comments

2 Comments

nadhirahjasri on 20 Sep 2017

this is cool!

Jacob Adamrovich on 22 Nov 2017

Good Job!

Solution 1248968

1 Comment

1 Comment

Rashmi Doijode on 9 Aug 2017

got it!

Solution 1248052

1 Comment

1 Comment

Matthias Witkowski on 8 Aug 2017

interesting

Solution 1208074

2 Comments

2 Comments

Guitarist Pandey on 8 Jun 2017

gud..

Alan Lai on 13 Jun 2017

good one!

Solution 1204937

1 Comment

1 Comment

rose on 5 Jun 2017

Good Job!

Solution 1101277

1 Comment

1 Comment

SIVAPRAKASH DANABALASINGAM on 10 Jan 2017

easy

Solution 1092567

1 Comment

1 Comment

TAYALAN SIVALINGAM on 28 Dec 2016

nice

Solution 1091783

1 Comment

1 Comment

mohamad Alhaddad on 28 Dec 2016

Solution 895551

1 Comment

1 Comment

Hanna Wells on 25 May 2016

This was a good problem/solution to start out on.

Solution 854729

1 Comment

1 Comment

Jonny Pats on 22 Mar 2016

this is a bad solution

Solution 662307

3 Comments

3 Comments

Prashant Ganesh on 28 Apr 2015

What is wrong with this solution?

Alex Buczynsky on 9 Oct 2016

the code is wrong because the function name should be 'add_two_numbers'.
In the test code the are evaluating:
assert(isequal(add_two_numbers(a,b),c_correct))

So if your function is called 'sum' it wont be called by the test script.

Abubaker SHERIF on 29 Dec 2016

idk

Solution 597734

1 Comment

1 Comment

Elizabeth on 17 Mar 2015

Try writing out the equation you want to use, with 'c =' on the left, and 'a' and 'b' on the right. You don't need to define c =.., a =.., or b =.. in the function.

Good luck!

Solution 578511

6 Comments

6 Comments

Show 3 older comments

Pinakin on 20 Apr 2015

hello brian !

I'd like to know how your solution size is 9.

Can you please let me know how you did it ?

Thanks !

Zhang Liang on 25 Jul 2016

Why is this of size 9? The long string?

Brian Moore on 26 Jul 2016

For the record, I don't recommend reading this, but here goes:

My solution is

function ans = add_two_numbers(varargin)
system 'echo "function ans = assert(~), true;" > ./assert.m';

It works by redefining the assert() function that the test suite uses to always return true. This strategy can be used to solve any problem. Many of the leading solutions to problems are hacks like this. It's actually quite fascinating to think of ways to "cheat" the system

Informaton on 24 Apr 2017

Ah, that makes so much more sense! Thanks for explaining Brian.

Danilo Zocco on 12 Jan 2018

Why is the following not accepted ?
add_two_numbers = @(x,y) x+y;

Solution size is also 9, but the solution is not recognized. Just wondering why, as it works in MATLAB.

Ezz El-din Abdullah on 7 Jul 2018

@Danilo Maybe the website prevents anonymous functions.

Solution 553362

1 Comment

1 Comment

Matthew Caron on 7 Jan 2015

This challenge was quite simple. Good for beginners.

Solution 523841

1 Comment

1 Comment

naushad on 8 Nov 2014

self explainable code. thanks to cody team

Solution 437159

1 Comment

1 Comment

azralmukmin azmi on 2 May 2014

really enjoy

Solution 404389

3 Comments

3 Comments

DrMiguelAngelus on 21 May 2021

What the...?

Abhay Singh Rana on 19 Jan 2022

from where could i learn this regexp

Stav on 11 Jul 2022

very cool

Solution 373019

1 Comment

1 Comment

Tyler D on 20 Dec 2013

Cool

Solution 266088

1 Comment

1 Comment

Du Juncheng on 24 Jun 2013

Error: Undefined function 'add_two_numbers' for input arguments of type 'double'

Solution 229691

4 Comments

4 Comments

Show 1 older comment

David Amor on 27 Apr 2013

this is not a function?
cheat.

Ugur Gun. on 19 May 2013

Can you explain how does it work?

Marek Kuklis on 28 May 2013

why this is working?

Santosh Kasula on 17 Jul 2013

It was a system error. I re-scored the solution, and that did the right thing.

Solution 141093

1 Comment

1 Comment

Margreet on 19 Mar 2014

Har har

Solution 25619

1 Comment

1 Comment

Dimitris Kaliakmanis on 11 Feb 2012

fast fourier transform should be fast anywhere,right?? why not here?xaxa Funny approach

Solution 11462

1 Comment

1 Comment

John D'Errico on 28 Jan 2012

Of course, c = a+b; is entirely correct, using the operator form for addition. plus(a,b) uses the function form.

Problem Recent Solvers34177

Problem Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Problem 8. Add two numbers

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers34177

Suggested Problems

More from this Author96

Problem Tags

Community Treasure Hunt

Problem 8. Add two numbers

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers34177

Suggested Problems

More from this Author96

Problem Tags

Community Treasure Hunt

Players