Does any one how can I calculate pi (π) in VB??
example: how can I calculate 2π in VB??
A:
If you don't want to use the built in values in the .net math library...
22 / 7
TheTXI
2009-04-26 06:33:16
There so several better fractional approximations than 22/7...
Mitch Wheat
2009-04-26 06:34:32
but use the buil-tin value!
Mitch Wheat
2009-04-26 06:35:18
I don't advocate for the use of a fractional approximation vs. the built in value at all, and 22/7 was the first one I could think of off the top of my head :)
TheTXI
2009-04-26 06:36:51
355/113 is a better approximation :)
Mitch Wheat
2009-04-26 06:59:23
I would rather use a constant float value like 3.14159, rather than 22/7 which is an inaccurate approximation. 22/7 produces the value 3.142857 and it is only useful for elementary school kids. ;-)
Cerebrus
2009-04-26 07:29:34
Or non-euclidean circles.
Rich Bradshaw
2009-04-26 15:06:26
Or someone who doesn't care for any major differences as the data's inaccurate anyway
tstenner
2009-04-26 15:48:10
22/7 contains TWO magic numbers whereas 3.14 only contains one! It must be twice as evil!
Artelius
2009-09-09 10:53:55
22/7 is only useful for people who missed celebrating Pi day on March 14th, and thus need to celebrate Badly Approximated Pi Day.
Trevel
2010-04-20 18:36:00
+12
A:
Assuming you actually want to compute pi instead of just using the built in constants, there are a bunch of ways that you can do it. Here are a few links that could be useful:
Paul Wicks
2009-04-26 07:02:44
+3
A:
If the OP is asking about algorithms as a learning experience, good for him/her.
If the OP wanted help finding the built-in value, s/he has it now.
But if the goal is a good value of higher precision than the built-in value with a minimum of effort, here's pi to one million digits:
http://www.eveandersson.com/pi/digits/1000000
That should be enough.
I hope the OP isn't asking how to recalculate the value of Pi each and every time it's used. That would be madness.
duffymo
2009-04-26 14:41:34
+5
A:
If you mean VB6, it doesn't have a pi constant. You can use:
Dim pi as Double
pi = 4 * Atn(1)
ggf31416
2009-04-26 15:16:55
A:
Henrik Paul
2009-04-26 16:19:04