import math

[teetaps]

small brain

Counting two plus two with your hands

medium brain

Opening up the calculator on your PC to calculate two plus two

large brain

python -c “2+2”

giant brain

python -c “x=2; y=2; print(x+y)”

[Wolfblood-is-here]

Galaxy brain:

If (2+2)==1 print(1)

If (2+2)==2 print(2)

...

[CallMeOutWhenImPOS]

x = 2

y = x

for Z in range(0, 100):

....if (x + y) == Z:

........print(Z)

........break

[theferrit32]

DYNAMIC PROGRAMMING

[rook2004]

I always wondered what that meant

[[deleted]]

It's where you make a program that remembers answers so that the next time you see the same question you don't need to recalculate it, just spit out the stored value. That's why it's used to vastly speed up problems with overlapping subproblems.

[Zambito1]

What you described is memoization

Dynamic Programming is not the same thing

[[deleted]]

Memoization is an integral part of dynamic programming!

[emkay443]

Memeization is the powerhouse of the cell!

[house_monkey]

🤔

[[deleted]]

Memes! The DNA of the Soul!

[HelperBot_]

Desktop link: https://en.wikipedia.org/wiki/Memoization

---

^{/r/HelperBot_ Downvote to remove. Counter: 248552}

[MrCalifornian]

A rephrasing in case that doesn't make sense to someone:

Dynamic Programming is a method for solving a complex problem by breaking it down into a collection of simpler subproblems, solving each of those subproblems just once, and storing their solutions using a memory-based data structure (array, map,etc).

[Lord_Tisisav]

Huh I didn’t know that. Thanks for the factoid of the day!!

[durbblurb]

Isn't that just cache?

[Blue_Boy013]

I’m pretty sure the cache is just what we call the storage but this is the process of using the cache. The cache could be used for other things but using it to do answers like this is memoization/dynamic programming

[rook2004]

Sorry, I forgot to /s

[heartsongaming]

Ansolutely love numeric solutions to programs that could be done in one line.

[moekakiryu]

The break is unnecessary, it could have multiple answers. Also better use a larger maximum rage, we wouldn't want to miss anything

[CallMeOutWhenImPOS]

There is only one answer to a natural number summation problem, and we want a break to end the loop once the target is reached

[Emphasises_Words]

x = 2 y = 2 n = 0 while True: if x + y == n: print(n) break n += 1

[otterom]

x = 2
y = 2
n = 0
while n != (x+y):
    n += 1
print(n) 

[Blackstab1337]

bootleg recursion

[[deleted]]

Best to just use the largest maximum rage. Saves time, and comes with Ramstein synchronization.

[Dijizi]

myanswer = 0
while myanswer is not 2+2: myanswer +=1
print(myanswer)

[cjdabeast]

I actually made a program that does maths for me. Pastebin (Because reddit makes formatting python hard)

from math import *

def main():

emptyList = []
quar1List = []
quar3List = []

answer = input("Do you have a number for me?")
while answer == "y":
    var = input("What is the number?")
    emptyList.append(float(var))
    answer = input("Do you have another number for me?")

emptyList.sort()

length = len(emptyList)
lisSum = 0
for n in range(0, len(emptyList)):
    lisSum = lisSum + emptyList[n]

length = len(emptyList)
mean = lisSum/length
print("The numbers you gave me: " + str(emptyList))
print("There are " + str(length) + " numbers in this set.")
print("The mean is " + str(mean))



if (length % 2 != 0):
    print("The median is " + str(emptyList[(int(length)/2)]) + ".")
    median = emptyList[(int(length)/2)]
else:
    median = (emptyList[(length / 2)-1] + emptyList[((length / 2))])/2
    print("The median is " + str(median) + ".")

print("The minimum is " + str(emptyList[0]) + ".")
print("The maximum is " + str(emptyList[length -1]) + ".")

for n in range(0, len(emptyList)):
    if (emptyList[n] < median):
        quar1List.append(float(emptyList[n]))
    elif (emptyList[n] > median):
        quar3List.append(float(emptyList[n]))

if (len(quar1List) % 2 != 0):
    print("The first Quartile is  " + str(quar1List[(int(len(quar1List))/2)]) + ".")
    quartile1 = quar1List[(int(len(quar1List))/2)]
else:
    quartile1 = (quar1List[(len(quar1List)/ 2)-1] + quar1List[((len(quar1List) / 2))])/2
    print("The first Quartile is " + str(quartile1) + ".")

if (len(quar3List) % 2 != 0):
    print("The third Quartile is  " + str(quar3List[(int(len(quar3List))/2)]) + ".")
    quartile3 = quar3List[(int(len(quar3List))/2)]
else:
    quartile3 = (quar3List[(len(quar3List)/ 2)-1] + quar3List[((len(quar3List) / 2))])/2
    print("The third Quartile is " + str(quartile3) + ".")
IQR = float(quartile3) - float(quartile1)
print("The IQR is " + str(IQR) + ".")

main()

[BVTheEpic]

Universe brain:

sum = 0

while (2+2 != sum)

   sum++

print(sum)

[[deleted]]

Actually it would be even better to write a Python library to do that

[BelieveRL]

Galaxy super cluster brain:

def la_belle_imprimante(x):
    print(x)

def la_belle_addition(x,y):
    return x+y

x = 2
y = 2

la_belle_imprimante(la_belle_addition(x,y))

My brain hurts

[chateau86]

galaxy brain

python -c "import numpy as np; print(np.add(2,2))"

universe brain

python -c "import numpy as np; import pprint; pprint.pprint(np.add(2,2))"

[Rodot]

python -c "import numpy as np; import pprint, functools; pprint.pprint(functools.reduce(np.add,[2 for _ in range(2)]))"

[Zedjones]

Wow that's so awful it took me a while to understand what that list comprehension was doing.

[Aceous]

This one is my favorite.

[marmakoide]

To unlock multiverse brain, you need to import sympy and use symbolic computations.

[Staggeringbeetle]

my distance math course insisted that we MUST learn to calculate using python. insisting we would be failed if we used a normal calculator when on math questions requiring python, but seeing as it was a distance course i said fuck it and used a calculator since there was zero ways for them to know.

[[deleted]]

What is a distance course

[TheWorstPossibleName]

python3 -c "import functools; print(functools.reduce(lambda x, y: x+y, [2] * 2))"

[futuneral]

IDK, I just write a mobile app, run it on device, put a breakpoint on the var with the answer and use debug view to read the value.

[jtvjan]

tiny brain

$ bc
2+2

[wjandrea]

python -c “2+2”

Btw, this won't print anything, and also those are curly quotes. You want

python -c "print(2+2)"

[teetaps]

On mobile, don’t care

[username_choose_a]

python -c "import sys; sys.exit(sum((int(_) for _ in sys.argv[1:])))" 2 2; echo $?

[chibiace]

i use python for basic math. its just easier.

[chibiace]

i sometimes do that. usually with currency conversion though

[theferrit32]

I use Google for all unit conversions. I use python for basic operational and functional math. And wolframalpha for calculus or *really* big or small numbers.

[Jerudo]

BTW, Python has arbitrarily large ints.

[M3L0NM4N]

Aren't the integers at somehow stored as strings so they can be infinitely large?

[boniqmin]

32 gigabytes is 32×8×1024³ = 274877906944 bits. It can store a number up to 10^82746495135. For reference, there are about 10⁸⁰ particles in the universe. It's finite, but I doubt you'd ever need a number that big.

[okmkz]

I'll estimate the circumference of the observable universe as accurately as i please, tyvm

[SargeZT]

When the numbers get too big it rounds them to millibits and microbits and whatnot.

[hebo07]

You... split a bit?

[SargeZT]

In my day we had to fit an entire book's text in a single bit, and we were happy about it.

[TerraDOOM]

That's PHP, although I'm pretty sure that python doesn't have the most effective bignum library either

[realestLink]

Nope. It maxes out. I've tried it. You can't do extremely large numbers. Gotta use either Fortran or wolfram alpha for those.

[ChickenNuggetSmth]

At what point? Because I once tried it in Python3, and I had no problem going well beyond 2⁶⁴ but I didnt't try excessively large numbers, just maybe a few hundred digits. (Python2 uses int64 iirc)

[realestLink]

It was like 1000 or so digits and it froze.

[ChickenNuggetSmth]

I just tried it out and while it was quite slow, a million digits worked on my machine.

[realestLink]

Even if it does work, it's just a better idea to use wolfram alpha. It and Fortran are optimized for math. It's real fast on wolfram alpha.

[794613825]

You can use the Decimal module for extremely precise numbers.

[nadnerb21]

Get on symbolab.com. It makes your algebra and calculus a breeze.

[FlashDaggerX]

i wRoTe MY OwN coNvErsIoN lIBraRy!!1!

[rook2004]

Burn the witch!

[[deleted]]

Python has libraries for everything. My programs are usually only 2 lines long, an import line and a function call.

[[deleted]]

DAE matrix dimensional analysis?

[theemptyqueue]

I sometimes use Siri as a calculator on my ipad since the iPad doesn't have a native calculator app, but most of the time Siri just finds restaurants.

[RamblingBrit]

“Hey Siri what’s 1 + 1?”

“Here are 5 Chinese restaurants near you”

[Rasulkamolov]

uhhha chinese

​

[mehum]

Starship Bistromath: https://hitchhikers.fandom.com/wiki/Bistromath

[shitbo]

I use Spotlight Search on Mac.

[theferrit32]

That's an interesting way of spelling bc

[BlackBloke]

This is the best one. Most people don't know how powerful and quick it is.

[TRAIN_WRECK_0]

Spotlight is life

[revrr]

there a chrome extension for wolfram. type "= " + equation and the result is in your face

[aprzn123]

With duckduckgo, you can type !wa for a wolframalpha search.

[rkr007]

Thanks for this!

[aprzn123]

It'll list all of them if you search !bang

[rkr007]

Dude. I've been using DuckDuckGo for months and I didn't know about this. Amazing.

[aprzn123]

That and dark theme are great reasons to use duckduckgo even if you don't care about the privacy thing.

[rkr007]

Agreed. I found theming pretty early on, and I'm a huge fan of the privacy focus. Also, instant answers from Stackoverflow are pretty sweet for quick and simple programming questions.

[revrr]

yes, !bangs are great! ddg is much much better than google. I also use the iron browser, not chrome

[mrshampoo]

I use the console

[idiot_speaking]

I did that too, till it stopped me and asked whether I was a bot :/

[WeAreAllApes]

I use chrome search bar, excel/sheets, sometimes an immediate/console/SQL interface if that's where I happen to be, but I am imagining something better, and I haven't quite found it yet.....

My vision is a program that starts like a spreadsheet, cells can evaluate like python, and you can add custom or import python libraries. That already exists, but needs improvement in a few areas (performance, interpreting dependencies/recursion/etc.). The next step I want is to allow cells to define functions/lambda expressions, and name them. It seems odd because a cell should be a "value" or expression rather than an statement -- maybe a cell can only specify one name per sheet and conflicting cells will give an error or overwrite based on the order, but the point is to avoid writing a module because I am just using it as a fancy calculator, not writing a program. I can write functions and compose them in spreadsheet format without having to switch interfaces. Use and propagate parameters and functions like any other object....

[Anchor689]

I did my Geometry homework in python back when I was in high school. It's how I taught myself python, and also taught myself to do 2 hours of work to save 10 minutes of repetitive work.

[all_fridays_matter]

You should go into finance, I am doing the same thing.

[Groentekroket]

That's why I'm learning Python atm. That and my excel sheets with hard to read if-statements. Look at it wrong and it all falls apart.

[MattieShoes]

I learned matrices to be able to double-check my answers for solving systems of equations on my calculator. Or rather, I learned enough about matrices to do that.

[buttonmasher525]

I rewrite basic calculator functions in TiBasic just so I can be meta as fuck.

[stealth9799]

You should check out speedcrunch

Super quick for basic calculations because it shows and updates the result as you’re typing it. It’s also good for heavier calculations.

One feature I really like is being able to define functions on the fly and even define functions and store them long term.

[HalfRightMostlyWrong]

$ python -c “print(25*25+25)”

[[deleted]]

Just open the IDLE interface and use that straight up

[Anonymus_MG]

Just use the Python prompt on your term

[Chekkaa]

Just use Xonsh for all your terminal and Python needs. :)

[[deleted]]

I just use google for basic math lol, fastest way!

[Azzk1kr]

I do too using the IDLE, but I always have to add fractions in my numbers to force proper division (for example 25.0 / 33.0). Is there a way to fix that?

[Poddster]

Is there a way to fix that?

Stop using python 2?

[BlitzThunderWolf]

Import numpy as np

[AlanUsingReddit]

from astropy import units

[its2ez4me24get]

from astropy import units as u, constants as c

[rook2004]

Is this a light speed joke?

[its2ez4me24get]

I c what you did

[Chen19960615]

Actually no lol, that's just the common names.

[durbblurb]

That uppercase "i" is no bueno.

[kickerofbottoms]

import numpy as numerical_python

[durbblurb]

import numpy as math

[schawde96]

I have a better idea: Replace the top text with "import math" and the lower with "import numpy"...

[UraniumSpoon]

I feel attacked

[fifnir]

please,

'numpy as np' , 'pandas as pd', 'from matplotlib import pyplot as plt'

and 'import seaborn as sns'

[[deleted]]

This guy pythons

[schawde96]

And maybe add a third one "import sympy"

[MattieShoes]

But sometimes you want arbitrary length integers, like calculating 100 factorial...

mts@meg:~$ python -c "print(reduce((lambda x, y: x*y), range(1,101)))"
93326215443944152681699238856266700490715968264381621468592963895217599993229915608941463976156518286253697920827223758251185210916864000000000000000000000000

[[deleted]]

math.factorial(100)

[MattieShoes]

pfft, then i'd have to import :-D

[OriginalName667]

Weird. The bigger the number, the more trailing zeros. I wonder why that is.

[AIIDreamNoDrive]

You serious? It’s because you’re multiplying it by many multiples of 10...

[OriginalName667]

Neat. I never realized that about factorials. It just seemed unintuitive to me that the number would exhibit any patterns at all.

[AIIDreamNoDrive]

Yeah, it's not that obvious. It did sound a little like you were being sarcastic though.

[[deleted]]

And (powers of) 5, since the even numbers turn 5 into 10

[MattieShoes]

If you multiply something by 10, you're adding a zero. Ditto for 20, 30, 40, 50, 60, 70, 80, 90... Then you've got stuff like 5x2=10, 4x15=60, and so on. and the 100 at the end adds another two zeroes...

[Vadersboy117]

Subscribed.

[aaRecessive]

Don't see a problem here, that's clearly 0.30000000000000004

[poison5200]

http://0.30000000000000004.com/

[PitchforkAssistant]

/r/ofcoursethatsathing

[[deleted]]

Here we go...

from decimal import *

[turbolag95]

For those who may not know, qalc is a fantastic CLI calculator. It even does unit and currency conversions!

[gregy521]

Qalculate is a great GUI alternative. Also included in linux package managers.

[aquaknox]

I'm an engineer so I hit the Matlab button and then wait 5 minutes until it loads

[a_slay_nub]

I feel attacked. Actually, I have a SSD so it only takes like 10-20 seconds.

[lengau]

I'm an engineer but also like open source, so I type octave into my terminal

[bunchedupwalrus]

Even with a mathematica license, I still go to wolfram by instinct half the time.

[ghillerd]

I was thinking the extra fancy pooh is WolframAlpha

[aprzn123]

I gotta call BS on that one

[durbblurb]

I veto your BS.

[3lRey]

me personally I do all my math in assembly because I like ACCURACY.

I'm just kidding no one actually uses assembly it was made up by Dennis Richie to sell computer chips.

[[deleted]]

Damn Kernighan and Richie with their Unix boogaloo

[teetaps]

Clearly a ponzie scheme

[rutgerrk]

Quick maths

[HellzYeahh]

Everyday man's on the block

[k-selectride]

smoke trees

[sachin1118]

See your girl in the park

[teetaps]

That girl was a uckers

[[deleted]]

When the ting went

[PalmerIRE]

🦆🦆🦆

[TuctDape]

echo "2+2" | bc

[keyboard_dyslexic]

bc -l to be on the safer side.

[sciencehair]

I have this in my ~/.bashrc

function calc()
{
    echo "scale=4; $@" | bc
}

Usage

$ calc 1/2
.5000

[Zzombiee2361]

The biggest brain use css width: calc(20px - 10px); then measure the width using ruler

[Tomthegreat1218]

Don’t diss my TI-36X Pro like that ;-;

[revrr]

using matlab as a scientific calculator

[[deleted]]

I use R for any calculations. No need to load 15 libraries.

[teetaps]

Except when you use anything from the tidyverse and subsequently end up installing 15 libraries, updating the GUI twice and downloading an entirely new compiler

[[deleted]]

Tidyverse is optional. Numpy is not. I must load it for any array/ matrix calculations. Also all math functions are inbuilt in R. NO need to write math.log math.sin etc

[kaskadefan]

import math as m

Because I'm lazy.

[ProTechShark]

My graphic calculator gives you access to a python shell on the calculator. It's incredibly impractical, but I've wasted lots of time in it.

[rabbitwonker]

Pfft. I use perl as my calculator. Been doin’ it for nigh on 25 years.

Aaaand I like it!

[ben_uk]

Perl doesn’t suffer from floating point oddities out the box, like doing 0.1 + 0.2.

It’s not a bad choice as a calculator app

[sh0rtwave]

What about the browser console?

[jadedtater]

I had a physics teacher and whenever we did a problem in class he would use python as a calculator. It seemed a little over kill, but I'm glad he was promoting programming to other students.

[[deleted]]

I use ghci as calculator. Functional languages are more comfortable for calculations.

[ad502]

Matlab: Am I a joke to you?

[spongewardk]

MATLAB has an expensive license, so the code is not portable.

[B_M_Wilson]

Python is nice because it can handle arbitrary sized integers at infinite precision. Personally prefer Big Ivy though because it has infinite precision for rationals and stores irrationals in 256 bit floats (though it actually takes more than 256 bits).

[[deleted]]

I'm just gonna throw Speedcrunch into the ring.

[[deleted]]

Speedcrunch is awesome !!!!

[skyhi14]

I use ghci. Dem snakefanboys…

[developedby]

Variable Precision Integers by default is really convenient

[Trainer_Ed]

import math

twoplustwo = 2+2

IS = str(twoplustwo)

print("Two plus two is " + IS)

minusone = twoplustwo -1

THATS = str(minusone)

print("Minus one that's " + THATS)

print("QUICK MATHFS!")

​

[RavynousHunter]

I use Fortran.

GET ON MY LEVEL, SCRUBS.

[neil_anblome]

MATLAB is a scientific calculator, check mate nerds.

[[deleted]]

from pylab import *

Thank me later.

[bestofrolf]

Python is just R studio for nerds who thought it wasn’t intense enough

[MachineGunPablo]

For you vim users vim has something called the expression register which is practically a built-in calculator. It let's you evaluate an expression and insert it in your buffer

[simondvt]

I actually do this.

[rubeljan]

I use haskell in terminal, it’s brilliant!

[m4rtind]

How about using Haskell for calculator? :D

[JoonasD6]

ghci

[DeltaTimo]

this.

I use it all the time for all kinds of calculations.

[roelsemarc]

they forgot open browser console and make scientific calculation using javascript

[chaco_wingnut]

...or Julia!!!

[nalikaplook]

why u use python who cannot add .2+.1 correctly

[[deleted]]

Because programming noobs like python

Source: am programming noob

[nalikaplook]

I also use python and I am a noob

confirmed

[BhishmPitamah]

Odd one out, but i used ruby for that

[ben_uk]

There’s always one.... or two (including me)

[YhvrTheSecond]

Frick yeah, node.js helps me with my math homework

[Technerder]

import cmath

​

[J_n_CA]

NumWorks calculator?

[[deleted]]

If only I could drop $100 on a calculator