I Made The World's FANCIEST Redstone Calculator!

[@Ierzi]

GUYS THE VIDEO ISNT SPONSORED BY BRILLIANT

[@thekaliss1]

we fr got a mattbatwings video not sponsored by brilliant before gta 6

[@theharmonichaoticartist]

Extra likes for the man he loves us

[@ELITE-CHIEF-DRILL-MAN-ko3yp]

HOW

[@VirnS_U]

Oh my gosh! 🤯

[@NK-61]

🤯

[@darske1]

I'm a mechatronics engineer and a senior software developer. I have to say that I'm amazed with all your dedication and creativity, mixing all the things I love in your videos. Keep it up man!

[@pilotharibo]

Blue comment on youtube?

[@wavejumper3]

Mechatronics sounds both like a job in a sci-fi movie and the exact field im interested in (a computer science major with a heavy engineering lean)

[@darske1]

​@@wavejumper3 If you want to study mechatronics, make sure to see how it stands in your country. In my country it is not very well-known, so companies often hire you to do things not really retaled to the career. Most of the engineers I met while studying now have a different job, and in my case I was fortunate that programming was one of my hobbies since I was a child, so now it's my job. The things I think the career was more focused on were electronics, robotics, and process automation (mostly programming PLCs) so it's fun if you like those.

[@icewizard7619]

Now for the Ultimate Challenge: Add Sqrt, Exponents Add Functions like sin, cos and tan Add Imaginary Numbers (-> Square Root of negative Numbers puts imaginary number) Add a nice Display to show Exponents, like graphically how you would write it, with the exponent on top of the Number. Good Luck! :) (Your work is absolutely amazing and I really appreciate it! I know some of these Ideas are very hard to impossible to build. Hopefully you always stay such a great KZbinr and Redstoner! :D)

[@elen1ap]

I guess that what you described is Turing Complete. We just have to wait for the end of let's build a Redstone computer.(Oh my god 36 minutes ago)

[@srengp3805]

It should also include constants like pi and e

[@icewizard7619]

@@srengp3805 Yes, in addition that would be cool too

[@icewizard7619]

@@elen1ap Turing complete requires way less than that, theoretically a ALU, Conditional Branches and Registers already is Turing Complete

[@BrankoVT]

I don't know if this already has it, but protection against invalid equations would be cool, as well as a backspace button.

[@GameJam230]

What you could also do if you wanted to have a history of old inputs is have the display be multi-rowed, but only the bottom row gets input to by the controls. Then, whenever you hit enter, it just passes the line to the row above it with some sort of 2D shift register, one for shifting the characters to the left, another for shifting everything up, making it look like a real multi-line calculator

[@skmgeek]

this would be really cool!

[@speedycube64]

Man, I got excited for complex exponentials, but still, amazing build. I once had a programming assignment to convert expressions to postfix notation, and now I finally know why that's useful, so that's cool.

[@everythingisscience658]

I feel like I just got clickbaited. There was a freaking exponential in the thumbnail. Not only that it was represented as a superscript rather than just ^. Imagine how cool that would be in redstone

[@Pabs1234]

its just trig, the exponent is i

[@aa-rv5wz]

yeah this is genuinely lame, postfix notation is first year uni stuff, shit thumbnail

[@PFnove]

You can write a program yourself that handles user input and rendering and all the calculations and run it on any redstone computer

[@ethanchristensen7388]

I was pretty disappointed with this, too. The end result was still impressive, but I feel lied to.

[@Guy_Thats_A_Guy]

Yeah you may be right, but when was the last time you made something on the skill of what Matt makes? If it’s fairly recent, then why not just make it yourself instead of complaining about a KZbin video showcasing something cool?

[@hyper_lynx]

It's amazing that this calculator is more competent than many old plastic desk calculators were. Having the full expression on screen at once is cool. Even old HP calculators just expect the user to learn postfix notation (though they make up for that by having a ton of functionality)

[@pixelgoose98]

part 2 idea!: ADD SIN, COS, TAN, ^ , and if possible, variables and also add pi and e etc

[@0kr4m]

nooo not sin cos tan 😢

[@LevelUpGA]

​@@0kr4m more like df(x)/dx 😁

[@lilcocoabean25]

sin cos and tan would be WAY too hard ngl, vars should be easy tho

[@Dummy42329]

even better, he should add the constants e, i and pi with exponentiation so that the thumbnail isn't clickbait

[@Kilming]

​@@Activation123I mean, it shouldn't be hard, it is just division

[@VoopVomm]

You’ve inspired me to learn so much more about computing and helped motivate me to major in computer engineering & programming!! You’re great keep up the amazing work!!

[@unflexian]

❤️

[@fantastic-b2m]

i’m currently studying algorithms using c++, and you just taught me two algorithms in a video, about the postfix thing, thank you and i think coding in redstone has probably the same difficulty as assembly, it’s a fantastic work and i appreciate it!

[@WildScaryFox]

The output cleaning part sounds a lot like significant figures

[@UODZU-P]

you would be correct

[@wueffiYT]

Hi foxy

[@artefox0]

@@wueffiYT hi waflle

[@WildScaryFox]

@@wueffiYT hi waffle

[@kngod5337]

On the minus sign topic. You say you use a binary minus and an unary minus but from my knowledge it should be possible to only use the unary to negate the next token and then add the previous instead of differentiating between the operations. In the end substraction is only adition by a negative number

[@mattbatwings]

Ah true, didn't think of that! Hardware wise I think it would end up being about the same - essentially the negator would be moved from evaluation to tokenization

[@AlphaFX-kv4ud]

​@@mattbatwings I'm glad you at least didn't do what my real graphing calculator does and make the user type in a different button for unary and binary subtraction

[@CheeseFilms]

​@@mattbatwingsHey, I want to clarify, in the video you said, if minus stands after digit, it's binary, if after parenthesis, it's unary. But, what if we type a negative number first, something like -4+7?

[@CheeseFilms]

@danyboumoujahed5004 yeah, thanks, but does he implemented it? In the video he tested just these 2, and I want to know if it is working

[@kaloncpu57]

Insanely cool step up for redstone calculators, and a redstone school is such a great idea. Banger video

[@Goldev]

Matt : "and i think the calculator is finished!" Me : What's 9+10? the calculator : 21

[@shinboonsangnoom8191]

Yeah it answers in base 10.

[@bobbydhopp65]

computation: base 12, answer: base 10

[@chairmanmeow9110]

This is, literally, the first time I've ever heard of writing math in postfix notation. That whole part of the video blew my mind...

[@electric-dinosaur-0]

Woah, this is wild!! I'm actually so impressed. I'm wrapping up my undergrad electrical engineering degree this year, and it's so cool to see all this stuff I've learned in my classes used in a project like this. The fact that I mostly understood it really gives me confidence. Thanks for putting so much effort into these videos!

[@REAL_TEst]

Part 2: Scientific calculator in Minecraft

[@eneaganh6319]

He already did a graphic one

[@TypekMD]

_part 3: _*_gameboi w/ calculator i n c l u d e d_*

[@notgate2624]

Implementing algorithms with redstone is so impressive to me. Incredible work as always! I love the teaching resources you're creating too.

[@Ngiyaaaw]

The way the number moves from right to left at 17:19 is so satisfying.

[@BlockExplorationVideos]

You have blown me away once again with your amazing Redstone skills! I'm only able to explain what these individual blocks do, but people like you take the blocks and make them more than the sum of their parts. My hat goes off to you, sir.

[@drevoksi]

This was an amazing watch! Great job, I love how it all came together :D

[@FlightlessAviator]

Just want to point out, at 8:20, There are a bajillion different versions of what you call PEMDAS. Here are some I've heard: - P arentheses - E xponents - M ultiplication & D ivision - A ddition & S ubtraction (This is the one I learnt) - B rackets - E xponents - D ivision & M ultiplication - A ddition & S ubtraction - B rackets - O rders - D ivision & M ultiplication - A ddition & S ubtraction (just found this one while looking up what the O is in BODMAS) - B rackets - I ndices - D ivision & M ultiplication - A ddition & S ubtraction

[@friesofthefrench]

I learned gems G- groupings E- exponential M-Multiplication/division S-Subtraction/addition

[@FlightlessAviator]

@@friesofthefrench Interesting. I think it does make more sense to have multiplication/division and subtraction/addition have only 2 letters, as this is how they work in practice.

[@PortRhouse]

This is damn cool. I've seen some other really incredible redstone calculator showcases (namely your very own incredible graphing calculator), but I like how this one distills the complex problem of evaluating an expression into it's fundamental steps, then concisely explains how to solve each of those steps from a redstone/ CS perspective and brings it all together in a complete package. I really feel like I understand what I am looking at with this build and it doesn't just seem like an impressive mess of wires.

[@sethklaassen2532]

How does this calculator handle dividing by zero?

[@LevelUpGA]

@@sethklaassen2532 definitely with TNTs 🤣💥

[@AGuyWhoDosentKnow]

2:0=... We found a problem with your computer, Shutting down

[@TheFakeXdfishy]

It implodes

[@lucajfelici]

Inf

[@SimplexonYt]

it probably just outputs all ones

[@JonDaFun]

Oh snap man! This is like the project I’ve been casually working on for a while except you did it I way better! Props to you!

[@redtaileddolphin1875]

lol fuck I missed the thumbnail mistake now it’s already fixed It said e*i^pi + 1 = 0 What’s correct and now there is e^i*pi + 1 = 0. The i was the same size as the e, when it should instead be same size as the pi

[@teggolT]

**technically**, it's e^(i*π) 🤓

[@unflexian]

hmm yes i love e^(iπ²/2+1)+1

[@85dot6]

very nice explanation on tokenization/ lexing

[@eagle32349]

You know, it would've been easier just to make number after a minus straight up negative (two's complement if you will) then just using regular addition. I also really liked the base 2 multiplication trick of just separating a multiplication into powers of two, then bit shifting, and finally adding back together, would've been cool to see a two way system for both multiplication and division, since all that's necessary for the entire calculator be this + two adders.

[@angeldude101]

This trick predates binary computers and even binary positional notation itself by _thousands of years,_ actually being considered easier than multiplying decimal numbers even for humans. It's often call "Russian Peasant Multiplication", though it seems to have existed even in ancient Egypt. Yes; people were doing binary long multiplication before they were doing _binary._

[@halidyildirim]

Thanks!

[@DolPuYOfficial]

"Dude whats 6 x 2?" "Wait lemme launch Minecraft"

[@SF124-was-a-taken-username]

9:05 okay, can we just talk about how the first thing in his search suggestions is "how to vote"?

[@MONOPOLY-RAGER]

I thought I saw that. I wasn't sure I saw it right.

[@shennyboi110]

Insane project, beautifully explained in a way I could follow along every step!

[@mikymuky1171]

I've been making calculators and other architectural stuff in redstone for years. yet, this is hands down the most invested I have been watching a technical redstone video yet xD

[@jajceslav5665]

You make it look easy, parsing expressions can be very tricky even when just coding, great job!

[@louisrobitaille5810]

8:33 Fun fact: literally anywhere in academia above high school, the PEMDAS order is slightly modified. For example, the notorious 6/2(1+2) has two *CORRECT* answers depending on which version of PEMDAS you follow. The first one, taught in high school and shown in this video would give you this: 6/2(1+2) = 6/2(3) = 3(3) = 9. The second one treats parentheses a little differently. If they're directly next to a number (or variable), that multiplication takes priority, which would give you this: 6/2(1+2) = 6/2(3) = 6/6 = 1. This difference comes from the origin of the division symbol (the 2 dots and a line in the middle). It's actually a fraction with dots replacing the numerator and denominator. If you were to write it down, 6/2(1+3) would be 6 in the numerator position and the rest would go below in the denominator position. If you want to end a fraction in any scientific calculator, you need to add an operator or a space to tell it that the fraction is done. If you wanted to get 9 no matter what PEMDAS you use, you'd have to write it as 6/2*(1+2), 6/2 (1+2), or even better 6/2 * (1+2). And if you really want to avoid any confusion, spam the parentheses: (6/2)(1+2) to get 9 and 6/(2(1+2)) to get 1.

[@mrBrod._.]

Good to know!

[@angeldude101]

From what it looked like, it didn't seem like this calculator implements implied multiplication, so this matter wouldn't really come up. Most programming languages don't support implied multiplication either, though it's actually possible to argue that implied multiplication acts more like a function call than an arithmetic operator, and function calls do generally bind more strongly than arithmetic operators.

[@thoracis]

I love seeing new vids of yours. I am not that great at math, I can barely make anything with redstone, but I do love Minecraft and learning. Wholesome, informative, and entertaining content as always ❤

[@thatviewer-4142]

I love redstone, but more importantly, I love the computers and the workings behind them. You've earned a subscriber!

[@shreyjain3197]

i learnt infix, prefix and postfix expressions in my CS class in 12th grade really interesting to see a practical application of it

[@Nfliixguy]

Actualy insane how you managed to pull this off

[@mastfamastfa1256]

Congratulations bro This is amazing

[@Mateo-zi8ub]

6:30 that is really, really useful.

[@Deficard]

that's some great progress! it feels better than any other redstone calculator ever. your breakthrough, i can sense that others might build complex calculator with just redstone too. there's just 1 unrelated problem i see: point digits precision. currently, this can display up to 3 digits of fraction, then it's gone. like "0.142". it's not a problem if you didn't want more precision and didn't want to see what the next digit of places is. here's the example where it outputs the same value. 1/999=" 0.001", 1/1000="0.001". and then after 1000 it either just goes to 0. but for how much it took, i can't complain too much...

[@goitwe8564]

dude, you managed to describe postfix vs infix in like 30 seconds with more clarity than my 25 minute class did. MASSIVE props!

[@J3ff_K1ng]

I really really did not expect this video to get that interesting

[@rodrigoqteixeira]

0:45 decimal point? I feel like fixed point arithmetic is coming. Edit: 3:12 YEAAAAAAA I GUESSED IT!!!!

[@Purple835]

nice one

[@mrBrod._.]

😂

[@DivorcedGooseRat]

i long for the day where someone makes a redstone computer powerful enough to run a real world operating system

[@masonbarber871]

I think a history display of recent equations and results would be cool and relatively easy. The most important thing for doing more advanced math would be variables and an "answer" button like a TI84. The answer token lets you use the result of the last equation in the middle of a new one, allowing for stuff like "1/Ans".

[@matthewmanzanares6798]

it's incredible how you turn computer algorithms in to redstone circuit. and every project is a new feat!

[@eikebehrmann3493]

Fun fact: Postfix is also called Reverse Polish Notation, and was used in older calculators. To save processing power, you had to write in RPN

[@PaulFisher]

HP calculators and their descendants famously still allow the use of RPN. It doesn’t just save processing power; it can also be way faster and less error-prone to use, since you never have to type parens and the intermediate steps you’re doing are right there on the stack.

[@apekz3592]

In theory you could make it interpret forth in mc with this calculator

[@willnoyes7019]

This looks amazing super well-made

[@lollocallollodipiazzacalollo]

Bro you are CRAZY you are the best

[@darianfrank4443]

Really good work. Love yozr Videos. Keep it up

[@shauas4224]

You are doing so much for the redstone community its insane

[@trwn87]

There is actually a different way to represent decimals: Internal fractions, which can optimise division and multiplication as well.

[@SuperbMuffin]

holy, good job i LOVE your channel

[@uIz_slc]

I suggest to use glow ink sacs with black dye on the siigns for better visibility, or white dye on signs with darker wood.

[@malmiteria]

next step: variables, and extending the calculator so it can use those and not only numbers then: functions, strings, and other types like boolean, none, and then lists. variable scope can become non trivial if you allow nested function or closures (function that are returned by another and still need to acces their parent function scope) the call stack can be a pain with closures. if you're adding classes, or modules or namespaces, the dot operator becomes necessary too. I'm working on a language of my own, that's pretty cool to see you make one in minecraft You might wanna share your language in the ProgrammingLanguages subreddit, i'm sure they'd be thrilled to learn about it

[@Atlas-gaming-4]

POV you learn you can make a calculator that can square root, square, multiply, add, subtract in all bases to any digit limit with just a chess board (to get higher digits you need a bigger chess board)

[@patrlim]

honestly, i dont care about the showcase, I come for the problem solving and engineering. great work as always.

[@Old_SDC]

This video is perfectly timed thank you!! I’m writing a calculator as a project in college and Shunting Yard was exactly what I needed 🫶

[@AGuyWhoDosentKnow]

I understand that a lot of effot anstuff goes to these recess but 20$/week is a lot, that's like 100zł, there is no way i coud ever possibly afford that

[@vinceguemat3751]

while you have only digits and the 4 basique operations, you know that every result will be in Q (set of fraction) so you can store any number with 1 int and one signed int and then when display is needed, display the result with a decimal approximation

[@IceMetalPunk]

I consider Shunting Yard one of the most important and useful algorithms in computer science, and I love how elegant it is. I've implemented it in software several times, typically when I'm creating custom programming languages for fun, but I don't think I've ever considered building redstone hardware to do it 😂 Well done! And now that you're an expert at building tokenizers... your next step is to build a full compiler for a redstone-based programming language 😁

[@TheRealH2OBlue]

Ok now this is just REALLY impressive. You are so insanely good at computer redstone than what I originally thought of you.

[@rodrigoqteixeira]

7:50 interesting. In the compiler I just made a - with nothing on the left, it implicitly adds a 0 token.

[@oglothenerd]

You had to implement a parser in redstone. I salute you!

[@AdamKeemen]

COOL CALCULATOR AND THIS VID IS AWSOME

[@iaminfinityiq7182]

This is exactly what I need! I've been struggling to make an evaluator that uses PEMDAS!

[@LissaThompson-s1i]

yo matt this is the coolest thing iv ever seen

[@bengoodwin2141]

This is pretty great! I hope you, or someone, makes one with variables. Something like a simplified version of a Ti-84, maybe. Also, if you want mathematical accuracy, it might be good to keep track of ratios of whole numbers instead of using fixed or floating point, and... There's likely a way to handle irrational numbers as accurately as necessary for any given level of precision you design for as well, but I don't know how.

[@JeremiahQuattrini]

Hello, I am a guy who really loves your videos and I have an idea for you. You don't have to make it if you don't want to but you can. You should make a calculator that can talk to you or do simple tasks for you. I think it is a really cool idea but it would be very difficult to make and isn't really logical redstone.

[@kirdow]

9:16 I want to mention that as opposed to Postfix there's also Prefix. So for your example, (1+2)*3 would become * + 1 2 3 and 1+(2*3) would become + 1 * 2 3. What I'm getting at is that these also have another name. Prefix notation is also called "Polish notation" named after Polish logician Jan Łukasiewicz who wanted a way to get rid of parenthesis. Due to how prefix notation works, postfix notation also works as shown in the video. Because of this, prefix notation is called "Polish notation" and postfix notation is called "Reverse Polish notation".

[@πτΩαπσ]

Okay, now make every function from windows calculator: dms, deg, floor, round, ceil, sin, cos, tan, cot, sec, csc, inverse trigs, hyperbolic trigs, all trigs but in radians, grads, mod, Gamma function (hidden under ! button), sqrt, exp, … Edited: Ultimate challenge: make Wolphram Alpha.

[@thisisricki5599]

*Wolfram Not just windows calculator, also other basic scientific calculators

[@FireAssassin124]

Always a great day when matt uploads

[@rangerocket9453]

I think you shoulda made a bigger display for the answer just like the window one… Amazin’ Project!!

[@Garfield_Minecraft]

bro finally built the FPU

[@trig-w4n]

Sounds like music to my ears I literally just got home from a long day of band comp

[@Niiki-]

wth is even that, i mean like, just how

[@atom1kcreeper605]

And, or, xor , not

[@MarkusPersson4]

it’s Minecraft

[@atom1kcreeper605]

​@@MarkusPersson4that to

[@MarkusPersson4]

@@atom1kcreeper605 too*

[@eeReal_Diamond]

The redstone builds become so hard, that there is an actual class about redstone 💀

[@emerald5567]

I understand people need bread, but like 40 bucks for a beginners course sounds a bit expensive ngl. most people probably couldn't fork out that much money per week honestly

[@emerald5567]

also you'd need to consider that the demographic of the course would most likely be teenagers to young adults which means they'd probably have little to no money to go to this

[@BoredEditor4k]

40 bucks gets you a solid understanding of low level memory management a solid understanding of assembly and much more is a steal for me

[@emerald5567]

@BoredEditor4k iirc they said 40$ a week. my family is upper middle class and would say no rather instantly, don't know how you would comfortably pay for that. if it was 40$ a month, then I wouldn't have commented anything

[@BoredEditor4k]

@@emerald5567 I'll gladly take away 40$ to get teached the concept of assembly

[@emerald5567]

@@BoredEditor4k you do you, I'd rather not pay for the equivalent of a steam game every week.

[@Technowizard811]

I go to college for electrical and computer engineering. This and the programable computer video taught me more in an hour or so than two professors could in an entire year. what the shit.

[@iO-Sci]

This is a fancy, sci-fi and serene Minecraft type calculator 공상 과학적이고 조용한 마인크래프트 유형의 계산기입니다.

[@Will_-it3mh]

man i struggled to do a "windows styled" calculator in a windows form enviroment in coding class. Very cool

[@pontu_com4586]

The man keeps going! Someday we'll see a minecraft, in 4k, in minecraft.

[@catman8791]

Funny, where I'm from, we call PEMDAS "BODMAS" It means the same thing but it stands for "brackets, ordinals, division, multiplication, addition, subtraction"

[@SuperTux20]

PEMDAS: Please Excuse My Dope-Ass Swag

[@Dfnkeyyy]

0:0 appearently to the calculator: 32767.999 thats the real output lol

[@thevalarauka101]

I suppose the calculator should have had something to prevent zero division

[@mani-cwaf]

well considering the fact that 32767 is the highest 14 bit binary number, and 9 is the largest decimal number, and it is in the decimal place, I think it's safe to say the calculator is trying to output infinity but doesn't have enough space to. would've be funny if matt added the tnt from his old calculator

[@thevalarauka101]

@@mani-cwaf largest 15-bit I believe (2^15-1), which makes the integer part probably a 16-bit signed integer

[@mani-cwaf]

@@thevalarauka101 I looked through the world download and the output seemed to be 32 bit input and 32 bit output with the carry ignored, but if the highest number is 32767, it means the highest number is 14 1s, which would be a 15 bit signed integer, if it's got 3 decimal places it probably can't exceed 12 bits past the decimal point, so not sure what the other bits are doing, maybe you're right and it's just 16 bits and 16 decimal

[@thevalarauka101]

@@mani-cwaf 16 bits decimal would give a minimum value of 1/65536, which is about 0.000015; even having 4 decimal places would appear fairly imprecise in places, so it kind of makes sense to show just 3

[@unflexian]

10:40 there are tons of esoteric programming languages where arithmetic works like this, the general term is stack based but my favorite is brainflak

[@MadocComadrin]

Stack-based languages often use pre/postfix for arithmetic, but you can have pre/postfix arithmetic outside of stack-based langauages, e.g. the Lisp family. There's also non-esoteric stack-based languages such as Forth.

[@BetaTester704]

Might be revolutionary for redstone computers going forward

[@scorsesefilms]

i like your funny blocks magic man

[@rodrigoqteixeira]

FINALLY NEW VIDEO!!! nice, let's ser what calculator v3 does

[@Maxjoker98]

Very cool video as always! "postfix" notation is also sometimes called "reverse polish notation"(and some scientific calculators use it or can use it directly). All these parsers in Minecraft redstone projects lately got me thinking... How long until the first Minecraft CPU has it's own redstone-based assembler/compiler?

[@samuelhulme8347]

I think someone has nearly done this a long time ago but I don’t remember who. (Except the assembler weren’t in game, it was an external program which created a schematic for the ROM that gets pasted in to the world)

[@Maxjoker98]

@@samuelhulme8347 Yes, people have built Minecraft CPUs with external assemblers/compilers - I'm actually nearly complete on mine. But I really want to see an *in-game* assembler/compiler, with no external tools needed! I wouldn't even mind if it uses command blocks, and more complicated parsers have been built in Minecraft before(e.g. SethBlings BASIC interpreter including lexer/parser/interpreter), although a "survival-friendly" version definitely could be build and would be cool!

[@teainnit27]

Nice, very impressive, now make it turing complete

[@undefined-none]

What?! You have make a math expr interpreter in Minecraft, when I was still struggle to figure out how to build one in C, but this video help me a lot!

[@AdamT69]

Dude. You're insane. Absolutely insane.

[@vinceguemat3751]

postfix and prefix notation don't need parenthesis AT THE CONDITION that any operator have a fix number of argument, and it's wrong, for -, as you said it, it can be unary or binary -

[@AydenTechAndStuff]

Quite good! If just my calculators were close to that...

[@MaZe741]

10x = 8x + 2x is actually really smart, I didnt see that you could only use shifts for that

[@johnroylapida1443]

The negative sign and subtraction sign was a pain in the ass when I first learned and tried to code infix to postfix notation

[@vibaj16]

same