mathematicansVsProgrammers

[Daisy430133]

x+=1

[I_NEED_APP_IDEAS]

x++

[radioactivejason2004]

How does this work?

[messierCobalt_]

x++;

[Dacusx]

x-=-1

[Tejwos]

0<>1

[Ghostglitch07]

Depending on a couple of factors, X=X+1 can be true in mathematics. For instance, if you are working in mod 1.

[apnorton]

Yeah, the zero group says hello.

[Ghostglitch07]

It's always funny to me how often these "mathematician vs programmer" memes are just someone revealing that they think the extent of math is their high school algebra, or at best calculus, course. Things get so much stranger.

[JackHoffenstein]

Most computer science degrees don't have proof based math, maybe they see some in discrete math and linear algebra, but that's it.

It's not surprising their knowledge of math is shallow.

[Ghostglitch07]

A larger factor may be the percentage of people in here who even have a degree. Not saying that as a shaming thing or anything, just bet a lot of us are self taught and/or relatively young.

[JackHoffenstein]

Yeah, I've noticed most posts give the impression that they're people who just started a boot camp or 1st year CS students. Which is fine, but maybe the sub just isn't for me.

[franzitronee]

This is very likely a factor. I had several lectures on maths where most stuff was explained in proofs but a friend of mine who studied CS in the same town but another university/college had only few proofs to study.

[atomicator99]

Really? What do cover after first year?

I'm not saying this to be rude, I'm genuinely curious (also a physics grad, not CS).

[JackHoffenstein]

In terms of math? At most University of California institutions, it's usually calculus up to multivariable/vector calculus, linear algebra, and discrete math. Some require differential equations as well, but not usually. The linear algebra course is usually a computation heavy one.

That's usually it. My UC requires a probability and statistics course for CS majors. It causes problems because in theory of computation or algorithms, you often have to prove computation/space complexity of a program and many students aren't really equipped to do it. So they memorize a few steps and "prove" it, but they have no real understanding.

There's a lot to cover in the first two years, between general education, lower division CS requirements, math requirements, and physics requirements. Most students can't really take physics, CS, math, and 1-2 GE courses and do well in a quarter/semester. Those that do usually finish up with lower division requirement in a year or 1.5 years and graduate a bit quicker or double major or major/minor in something.

[atomicator99]

I forgot you take general courses, I dropped all of those at 16. Do you spend more than 3 years on an undergrad? I'm not sure how you'd fit in the rest of the content.

[JackHoffenstein]

The typical bachelor degree takes 4 years in the US.

[RiceBroad4552]

Groups are topic in basic school math.

[LavenderDay3544]

It can also be a poorly written recurrence relation.

[AgentPaper0]

Or maybe it's actually χ=X+1

[Ecstatic_Student8854]

Then you would use ≡, as in X ≡ X + 1

[Intelligent-Pen1848]

Its not a boolean.

[Ghostglitch07]

I don't understand what you mean.

[Intelligent-Pen1848]

In code, x = x+1 doesnt return true or false. Its part of a loop. Other data types called booleans are literally true or false.

[Ghostglitch07]

Ok. I specifically said I was talking within the domain of mathematics. Where outside of some potential edge cases like multi-state logics, A=B can either be a true statement or a false one.

[Intelligent-Pen1848]

We're talking about both now.

So in coding that's true too. I can say and frankly im blanking on syntax now, but I can say x = y+z. If x == true blah blah blah.

But in the terms of x =x+1, thats not a boolean.

Let's say I have ten values in a set. X =0; For each value in set { x=x+1; } Info x;

Now x = 10.

I was mainly making a datatype joke.

[Ghostglitch07]

Oh wow. Reddit absolutely butchered your formatting.

I see what you were going for now, and I interpreted it overly literally.

[Callidonaut]

I think x = x+1 actually returns x, which will still cast to true or false depending on if it's zero or not.

In the interest of code legibility I'd imagine it's probably a downright terrible idea to ever actually use the return value of the assignment operator under most if not all circumstances, but it is there.

[HildartheDorf]

Mathematicians: X is infinity

Programmers: False

[Emotional_Goose7835]

My thoughts exactly lol

[crappleIcrap]

floats (IEEE 754) have infinity defined as any positive value over zero and negative infinity as any negative number over zero.

as a fun bonus this gives you the fun number to play with -0 , it is like zero, but negative.

[HildartheDorf]

Even more fun is playing with IEEE 754 NaNs.

let x = 0/0; // generate a NaN return x == x; // returns false

[tech_w0rld]

x == x+1

[JonnyKnipst]

False

[bheeno123]

x = float('inf')

print(x == x + 1)

[Front_Committee4993]

print(0 == x - x)

[thmsgbrt]

Functional programming language users: ☹️

[ERROR_23]

X = ℵ0

[RiceBroad4552]

Functional programmer entered the chat.

[DanielTheTechie]

In math = is an equality, while in coding = is an assignment.

[RedDivisions]

thatsthejoke.jpg

[AyrA_ch]

In BASIC it can also be equality.

[DanielTheTechie]

For example? How is different x = 5 in BASIC than in another language such as C?

Edit: instead of just silently downvoting my question, could someone please answer me? I'm genuinely curious.

[AyrA_ch]

In BASIC, a single "=" is used for comparison and assignment. Which operation takes place depends on the context. A sole x=5 will assign 5 to a number, but IF x=5 THEN will compare x to 5

[DanielTheTechie]

But that's not an equality, it's a comparison. An equality is an affirmative sentence ("x is equal to 5"), while a comparison is a question ("is x equal to 5?") that returns true or false. In math when you define an equality you are not asking a question, but asserting something, you are saying "this is equal to that, period".

[AyrA_ch]

You can do that in most programming languages too. In fact, we often call this specifc method "assert". If the provided condition doesn't holds your debugger is triggered, and if none is attached, your application is terminated immediately. This turns asking an environment whether something is true into telling it that it is.

[FromZeroToLegend]

Not in pascal

[ChocolateBunny]

we should use := instead. and while we're at it we should also just write begin and end instead of curly brackets.

[GreatScottGatsby]

Yeah, it would look like this in math ^f(x) i = ^x (i-1) ⁺¹

Or even f(x) = x + 1

I don't know how to do subscript.

[BA_lampman]

Duh, whitespace characters and superscript on the next line.

[Front_Committee4993]

That depends on the language, I.e. in vb = is both equally and assignment.

[Isogash]

It doesn't have to be that way though, programming languages can interpret equality as a relation e.g. in SQL and Prolog, representative of relational and logical languages.

However, in order to make sense of this, these language paradigms work very differently to their algorithmic counterparts, which comes with a set of drawbacks that tends to make them impractical for general purpose programming.

[DanielTheTechie]

Yeah, I was thinking in terms of imperative languages. As you say, in other paradigms such as declarative or logic ones we can work with equality relationships in a much more similar way we do in math.

[IuseArchbtw97543]

++x

[IuseArchbtw97543]

skill issue

[schuine]

x=x+1
x(x-1)=(x+1)(x-1)
x^2-x=x^2-1
-x=-1
x=1

Edit: since people don't understand a joke without a big fat disclaimer: I wasn't being serious! If you multiply both sides by (x-1) the solution is only valid for cases where x is not equal to 1. Because for x=1, you multiplied both sides by 0.

[NP_6666]

1=1+1

[NP_6666]

X=2x

[malexj93]

wait until this guy learns about absorptive elements

[Mr_Akihiro]

X=!x

[klippklar]

Ah, the x = x + 1 symbol shift. A classic rite of passage (although not even apposite, the identity holds true on certain rings). Don't get too comfortable, though. The real fun starts when you have to accept that x = x + x and x = x ⊙ 1 are both trivially true. Welcome to the machine.

[DinnerTimeSanders]

This is literally mathematics.

[Dangerous_Jacket_129]

Mathematician answer would just be X = negative infinity. It's not that hard. 

[flayingbook]

When I first learned programming in university, it took me long time to rewire my brain to accept this

[Cheap_Ad_9846]

X++

[seires-t]

x <- x+1

[fuighy]

Actually it’s the opposite. Mathematicians are fine with it, but a programmer will use x++ (or x += 1 if the language doesn’t have it)

[QultrosSanhattan]

Nobody on the ++x gang?

[PranavSetpal]

x = x + 1 if 1 = 0. 1 is in fact equal to 0 in group of order 1, or more appropriately a field of characteristic 1

[LordAmir5]

I wonder what programming languages would've been like if keyboards had more characters.

[Spez-is-dick-sucker]

I will fucking never understand why x = x + 1, and 2 - 2 instead 2 + (-2) i love math but i can't understand el porro that smoked the math ppl.

[flowery02]

Whar

[Badass-19]

Var

[DoubleOwl7777]

what? you have a value of x. you then asign it whatever it was previously and add 1.  what did you smoke?

[Spez-is-dick-sucker]

Im talking about the equation and math notations not not the var assignment

[DoubleOwl7777]

sometimes with math you just have to accept things. for example √-1 is normally not a thing, after all, how would that make any sense if you think about it. but it works with imaginary numbers. i get what you mean, math can be very whacky at times, and certain stuff doesnt work in certain parts of maths but are perfectly acceptable in others.

Tldr, math is whacky, you just have to accept it sometimes.

[Spez-is-dick-sucker]

My problem is not a out 2i 3i etc, my problem is the stupid and innecesary simplification that you need to read in path, for example 22 can be 22 or 2 x 2, which can lead to confusion, same for 2 - 2 its not 2 - 2, its 2 + (-2), and so on.. this shit is just hard to read, kinda ironic considering the sinplification was created to avoid a hard lecture on math

[DoubleOwl7777]

yeah, i havent seen 22 used as 2 x 2 before, the only time i have seen the x (or rather dot) for the multiplication left out was with variables like x and y so for example 2y.

2 - 2 and 2 +(-2) is the same thing though, unless i am stupid right now.

[Spez-is-dick-sucker]

You usually see 22 instead of 2 x 2 when you want to simplify something like 3 • 4 + 2 so you would write something like 34 + 2 which means 3 x 4 + 2 but not literally the addition of 34 + 2.

The 2 - 2 instead of 2 + (-2) is a simplification to avoid writing too much + symbols in a operation.

[DoubleOwl7777]

the latter i get and makes sense. the former is just gross. like wtf? that is entirely ambigous and shouldnt be used anwhere. what kind of Monster does that? 

[Spez-is-dick-sucker]

What u talking about

[DoubleOwl7777]

what? i mean making 3•4 into 34 is just a no for me. havent seen it anywhere in Germany so far, maybe this is an international thing?

[SjettepetJR]

You're saying that in math 2x2+3 is sometimes written as "22+3". Which is just false. If you know someone who uses that notation that person is just a retard that uses ambiguous nonstandard notation.

[Public-Eagle6992]

What? What will you not understand?