I am trying to calculate pi with math operators, how can i connect all the math operators together in order to calculate the first 30 digits of pi, and also, if you know math, how do you calculate pi?
Currently i have no progress.

Pi is the ratio of the circmuference of a circle over the diameter, or the amount of times the diameter fits into the circumference. Unfortunately I don't think Scratch can handle 30 digits of an irrational number, it will round the number to the 16th place.

Flipped_ wrote:

Pi is the ratio of the circmuference of a circle over the diameter, or the amount of times the diameter fits into the circumference. Unfortunately I don't think Scratch can find 30 digits of an irrational number.

That doesn't help, try look at:
https://www.wikihow.com/Calculate-Pi#Using_Arcsine_Function.2FInverse_Sine_Function_sub
Then try to make it to scratch.

I tried using operators to recreate the equation on Scratch, but it seems to always return 180. I even put the equation into a scientific calculator, and I still got 180 as the answer. Maybe the equation is wrong?

Flipped_ wrote:

I tried using operators to recreate the equation on Scratch, but it seems to always return 180. I even put the equation into a scientific calculator, and I still got 180 as the answer. Maybe the equation is wrong?

Search up how to calculate

The best thing I could find that could be computed in Scratch was 355 divided by 155, which gives the value of pi to the 6th digit.

the formula is correct but the picture of the calculator is wrong…it should be on radians (RAD) not degrees (DEG)
Scratch uses degrees so you might be better using a different formula. Try Pi = x * sin(180/x) where x is any number but the bigger the better

Did a little test project based on an example equation i found: https://scratch.mit.edu/projects/294999544/

it is based on an equation from: http://mathworld.wolfram.com/PiApproximations.html with many different ways to get pi but here is the one i used below that is supposed to be to 30 digits and doesnt need to be in radians.

pi ≈ (ln((640320)^3)+744)/sqrt(163) (sorry if my parentheses are off)

I found that putting it in a variable only gave me 7 digits but putting it in a list gave me 16 digits of pi. the only issue that i ran into was exponent but i added a logarithm to fix that. so overall it looks like

hope this helps.

Here are two of my projects that have “easy” math to calculate Pi.

The projects do not calculate Pi to 30 places as that is beyond the Scratch limit for storing significant digits.
(The Scratch limit is about 15 digits as in most computer languages).

An Approximation of Pi: https://scratch.mit.edu/projects/149771540/

Pi by Polygon Perimeters: https://scratch.mit.edu/projects/150047760/

To understand the math in this second project, read the comment inside the project and make a drawing following the instructions there.


* If you want to see how mathematicians might calculate Pi on a PC, see
Super Pi Calc by @DadOfMrLog https://scratch.mit.edu/projects/47680290/
It calculates 1000 digits of Pi in 1.3 seconds on my PC.

I made an approximate one using the infinite (1/1)+(1/3)-(1/5)+(1/7)… formula. And it's incredibly accurate.

CrystalGames98 wrote:

I made an approximate one using the infinite (1/1)+(1/3)-(1/5)+(1/7)… formula. And it's incredibly accurate.

True. But it's also VERY slow. even after adding and subtracting 500000 times, you only have 5 digits of pi correctly calculated. So try other methods of calculating pi.

chrdagos wrote:

CrystalGames98 wrote:

I made an approximate one using the infinite (1/1)+(1/3)-(1/5)+(1/7)… formula. And it's incredibly accurate.

True. But it's also VERY slow. even after adding and subtracting 500000 times, you only have 5 digits of pi correctly calculated. So try other methods of calculating pi.

Please don't necropost.

1/1+1/3-1/5…
1/v+1/v-1/v…-pi!!

idk how to calculate pi but here is more than 30 digits memorized:

3.14159265358979323846264338327950288419

s182588m wrote:

idk how to calculate pi but here is more than 30 digits memorized:

3.14159265358979323846264338327950288419

hey, uh, there's too many necroposts here, please stop posting on old topics, just look at the date of the last post and consider if you should post, and if it is old, just make a new topic. calculating pi is pretty complicated though, but there are some pi calculators on scratch so it is definitely possible to calculate it. you may need to look it up though, and some answers are already at the top of the thread.