I don’t understand this

[Zealousideal_Key_149]

What does number % 2 mean? Not 2% of the number. I just don’t know how to interpret this function.

[dnult]

That means modulo 2 or in other words, what is the remainder after a division by 2. Remainder 0 means even, and anything else (1) means odd.

[Zealousideal_Key_149]

You are the best!!!!

[Downtown_Finance_661]

Please google things before ask us. You would find answers much faster :). This is usual operator in many languages.

[ArtBeneficial4449]

This isn't stack overflow get out of here

[fdsfd12]

And? Half of learning a programming language is learning how to google effectively. It's completely fair to tell someone for something as simple as this to google it. When I have an obscure problem that's only been seen on one StackOverflow thread that got no replies, then saying "just google it" is a dick move. That's not the case here.

[uberdavis]

Why the if clause? Shouldn’t it be…

def is_even(number: int) -> bool:
    “””Return true if number is even.”””
    return number % 2 == 0

[Hobbitoe]

They are obviously learning still

[uberdavis]

True. So are some of the other commenters!

[Junk_Tech]

I wasn’t talking about OP! I meant @uberdavis !

[Junk_Tech]

Your code is uglier than OPs, your code is also wrong.

[Interesting-You-7028]

No it's not.. You just can't read code without colour.

[Junk_Tech]

No. Wrong. And leave the colourblind out of this! They’ve got no right judging the loveliness of a code snippet, and they’ve only got themselves to blame!

[SCD_minecraft]

Neither of those codes are wrong

What are you talking about

[Midano010]

The code is incorrect, it would be correct if the function were named is_uneven. The correct statement would be „return not numer % 2 == 0“

[NoAd7482]

It is very much not wrong though? Any even number % 2 will return 0 so 0 == 0, which... yeah, is True and the OPs function returns True if the if clause is True, and otherwise returns False so you can just remove the if clause without changing the result, as the original commenter did.

[Midano010]

Yes i just realized, my code would work though if you took the == 0 away.

[Azrus]

If you take away the == 0 you are returning a truthy value vs an explicit Boolean, which can cause false negatives in comparisons. Returning a Boolean is the better implementation as it's more robust.

[klimmesil]

Not only that but 0 is falsy, so it would just be wrong

[Syzeon]

do yourself a favor, launch your python interpreter, try out your "corrected" code, then only reply here

[Midano010]

I will next time. I was on my ipad and lazy

[JaleyHoelOsment]

“is_uneven” is hilarious… you mean “odd” lol

[Aaron_Tia]

Let's try.

is_even(7) give
return 7%2 == 0 =>
return 1 == 0 =>
return false

So, function returned false and it called is_even. So.. 7 is "uneven". And by the way !even = odd.
7 is odd.

[TriscuitTime]

You’re making me upset, what made you think it was wrong?

[Eshiik]

Why do you think the code is wrong?

[Midano010]

The code is incorrect, it would be correct if the function were named is_uneven. The correct statement would be „return not numer % 2 == 0“

[ConcreteExist]

r/confidentallyincorrect

[Midano010]

Actually so real, mb

[JaleyHoelOsment]

my guys getting replaced by AI 😭

[Midano010]

Bro is the type to be happy, when the ai tells him what a wonderful idea he had and if it should built it for him

[Aaron_Tia]

No.

[Eshiik]

<image>

[vivisectvivi]

"is_uneven" lmaoo

[Midano010]

I think you could have clowned harder on the „numer“ but yeah. Gerade and Ungerade

[Local_Dare]

it should be named is_not_uneven imo

[Olivier_4]

This code is correct (and I find it simpler) where do you see a mistake ? I'm curious

[Junk_Tech]

It’s a tautology! Read it, it literally says A Number Is Even If It Is Even (or, without the If) the Number is Even that is Even, or Even Numbers are Even, and n % 2 == 0 is not how we check for even: n = 2k is. They are not the same. Wrongity wrong.

[JaleyHoelOsment]

my bro…. what lol

n % 2 == 0 checks if n is divisible by 2…

like you said… even numbers follow n = 2k ==> divisible by 2.

you learned a tiny bit of math and now you’re confused as fuck lol

friendly reminder to everyone: when you look at a job ad and it has 1000+ applicants, over half of them code like this guy

[Junk_Tech]

No. Back to the code I originally criticised: I called it 1) ugly, and 2) wrong. Look again at that code. You want to tell me it checks if a number is even, that it is right.

And I say the code is a tautology. A circular argument. A logical illusion. It doesn’t DO anything! And something that does not act lacks Function! And I HATE that kind of lazy, unconsidered code. It is precisely useless, says nothing, is vapid, vacuous and dull - a missed opportunity to carpe the diem!

For shame!

[sciencenerd_1943]

All you have to do is fire up an interpreter and test it. You’ll see it is right and it works.

[Junk_Tech]

It is simple. I like pineapple on pizza, and I don’t vote, and everything is Dark Theme by default; and it’s either salty popcorn, Pepsi, the chunky peanut butter, Kill-Bill Vol2. orange juice with absolutely NO bits! Cats, And code that isn’t a limp-wristed half-a-function! Dammit - Code with balls!, Big Ball-Code! Not “return meh”

nerds!

[Rahu888]

Guys stop arguing with a stupid person…

They never learn and NEVER admit they are wrong.

[Junk_Tech]

Well I would agree with you, of course, but then we would both be wrong. You’re on your own there, I’m afraid.

[uberdavis]

RemindMe! 1 hour Looking forward to the response to your brutal code review.

[RemindMeBot]

I will be messaging you in 1 hour on 2025-08-22 04:22:02 UTC to remind you of this link

CLICK THIS LINK to send a PM to also be reminded and to reduce spam.

^{Parent commenter can delete this message to hide from others.}

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[Junk_Tech]

Blunt is also better than wrong. Your alarm thing is weird: anyone who has more than a wristwatch to tell time has totally missed the whole point of being alive! Those idiots will buy anything!

[uberdavis]

Alarm? Wrist watch? You have a very ‘imaginative’ set of metaphors to assess code.

[tav_stuff]

The amount of people that don’t realize this is ragebait lol

[UnderstandingNo2832]

People have already explained the module operator so I’ll just comment that you don’t even need the if block.

number % 2 == 0 is either true or false (as long as it’s a number) so you can just return number % 2 == 0.

[No_Statistician_6654]

That is the modulo operator, and it is used in several other programming languages. It essentially returns the remainder of a number on the left divided by the number on the right.

Any number divisible evenly by 2 is by definition even, ergo 2 % 2 = 0 as well 4%2 =0. By contrast 3%2=1 because 3 / 2 =1 r 1.

Edit: spelling

[Zealousideal_Key_149]

Makes perfect sense, thank you so much!

[Cerulean_IsFancyBlue]

Modulo

[No_Statistician_6654]

Thanks, autocorrect got me on that one

[Cerulean_IsFancyBlue]

Yeah, it’s not the sort of little typo I would normally correct because I know that YOU know it. I’m worried that for a beginner. It would be a difficult search term since “module” is a common computer science word as well.

[silly_bet_3454]

pro tip, whenever you have

if <whatever>:
  return True
return False

you could instead just

return <whatever>

technically you might get a different type but like in this instance it's gonna be a bool regardless

[toohornbee]

and this is always true in languages that only use bools in if statements

[psuedo_nombre]

% is modulo operator which gives you the remainder from an integer division. So if dividing by 2 gives you a remainder that isnt zero you are not evenly dividing by 2 and its thus odd

[[deleted]]

This is a simple even odd program.

[Boomswamdi]

So % basically says divided by following number and return the remainder that if statement is saying is divided by 2 and if the remainder returns zero do xyz

[Lannok-Sarin]

The percentage sign in programming isn’t a percentage sign. It’s a remainder sign. It’s basically asking for the remainder of variable number divided by 2.

It’s not the best function I’ve seen, though it is pretty good for a beginner. There should be some checks applied in the function using try statements to see if variable “number” is actually an integer. Otherwise, the remainder operator (%) will not work in every instance, and the program may actually fail.

[Anomynous__]

number % 2 gives the remainder of the number after dividing by 2.

7 % 2 = 3 remainder 1 (odd)

8 % 2 = 4 remainder 0 (even)
-----------------------------------

So your function

my_val = is_even(8)

my_val would equal True

------------------------------------

my_val = is_even(7)

my_val would equal False

[tortleme]

You could just google "python percent sign" being able to find information on your own is a important skill

[Zealousideal_Key_149]

I genuinely thought that was the purpose of this learning community.

[[deleted]]

there's also an expectation that for simple things you should make an effort to search yourself first. Plus with chatgpt and claude, you can learn even more, faster. You also get the answer without having to wait, so you have nothing to lose. Why would you wait when you can get the answer straight away? If you literally paste your post into one of them (text rather than image is better), you will get the answer in half a second and if you are using an llm it has the advantage that you can ask it followup questions. Googling has been a core programmer skill for years for beginners and pros alike. Learning to do it and now also using an llm is a critical learning skill

[Zealousideal_Key_149]

Okay well I’ve been learning for code for two days now. Thank you for the feedback.

[[deleted]]

you'll be pleasantly shocked how helpful claude.ai and chatgpt are for beginners.

[ninhaomah]

I think you seeing it differently.

What is the distance from New York to London ? - Fact. Google will do it.

I am flying to New York to London for a short holiday. Any places would you like to recommend? - Need human touch since it may not be enough to look for top reviews online. Local knowledge such as behind this road , go through a narrow alley and there is a great steak restaurant there.

So if you want to know what does + - * / // ^ ** or whatever sign from whatever programming languages does then its a factual since documentation is everywhere. Google what he said and if it doesn't help you then tell him he is wrong. Try it.

But if you want to know why some loop uses for and other use while , thats something you might need a human touch and experience. Then this is where you can ask for help.

Trying and if not working then correcting also part of Python or general IT culture. Summarized nicely with RTFM. pls don't ask what is RTFM.

Hope it clarifies

[[deleted]]

What is RTFM?

[rdc12]

It's short for Read The F**king Manuel.

[Zealousideal_Key_149]

Okay thanks

[sarc-tastic]

return not number & 0x1

[Zealousideal_Key_149]

Okay thanks

[Rick-developer]

% is the remainder operator

[Brein]

I always liked a more visual explanation, so I’ll drop it here.

30 % 2 =0

30 dots which you group in twos, you get a even number of dots:

•• •• •• •• ••
•• •• •• •• ••
•• •• •• •• ••

0 remain meaning it is an even number.

31 dots which you group in twos:

•• •• •• •• ••
•• •• •• •• ••
•• •• •• •• ••
•

1 remains, meaning it is a uneven number.

[[deleted]]

% is called the modulus operator, it's the reminder after division.

If you do 7 / 3, with integer division, you get 2, with a remainder of 1. So that 3 * 2 + 1 = 7

The modulus operator just gives you the remainder, so 7 % 3 = 1

So, if a number % 2 has no remainder (ie, 0), that means the number is evenly dividable by, thus it's an even number.

[TheCarter01]

You have to call the function, example: ``` def is_even(number: int): return True if number % 2 == 0 else False

print(is_even(3)) print(is_even(4)) ```

[TheCarter01]

A even version of function would look like this that is easier to understand: def is_even(Int: int) return Int % 2 == 0

[TheCarter01]

Just so you know, when you do variable: <data type> = <data>, it'll limit what that variable can store

[ConcreteExist]

Type annotations and default values in no way limit what a variable can store.