Is number pi, precise on Roblox LUA?

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#1

Hello, good day to everyone!
:slight_smile:
So, as far as I know
When printing math.pi it justs prints this numbers: 3.1415926535898
I was wondering, if it was ‘precise’ the number pi?
Or it justs that number?
Or it prints that to prevent printing a big number?

Because, I mean this are the first 1001 characters of number pi as far as I know

3.14159265358979323846264338327950288419716939937510 58209749445923078164062862089986280348253421170679 82148086513282306647093844609550582231725359408128 48111745028410270193852110555964462294895493038196 44288109756659334461284756482337867831652712019091 45648566923460348610454326648213393607260249141273 72458700660631558817488152092096282925409171536436 78925903600113305305488204665213841469519415116094 33057270365759591953092186117381932611793105118548 07446237996274956735188575272489122793818301194912 98336733624406566430860213949463952247371907021798 60943702770539217176293176752384674818467669405132 00056812714526356082778577134275778960917363717872 14684409012249534301465495853710507922796892589235 42019956112129021960864034418159813629774771309960 51870721134999999837297804995105973173281609631859 50244594553469083026425223082533446850352619311881 71010003137838752886587533208381420617177669147303 59825349042875546873115956286388235378759375195778 18577805321712268066130019278766111959092164201989
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#2

It’s as printed, you would need to define it as that if you wanted greater precision. I’m unsure as to why you would need that in any practical situation though

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#3

The number can only be as precise as a double can be. In this case, math.pi appears to be 3.141592653589793. Any more decimals will not make a difference.

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#4

It’s 15 numbers accurate in Studio which is enough for most cases involving its use, what would you need further precision for?

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#5

Just saying, Just asking why it wasn’t really precise, as wow stated, any more decimalds will not make a difference, just asking :stuck_out_tongue: Thanks!

#6

As others have said, IDK why you’d need this but here’s an idea:

You can use HttpService and get more digits of pi off of a website, then you can use string functions to cut that string off wherever you want to.

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#7

Roblox automatically rounds printed numbers to around the nearest 15th digit (I believe) unless manually formatted.

print(string.format("%.55f", math.pi))

Using this line of code, you can round pi to the nearest 55th decimal point. The received output is 3.1415926535897931159979634685441851615905761718750000000.

It seems that math.pi is rounded to the nearest 48th decimal place, which as you’ve already stated adds a level of precision that isn’t necessarily important.

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