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Handle significant figures in VB.NET

Posted on 2004-09-28
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Last Modified: 2010-08-05
Dear all,

  I am trying to handle calculation between numbers, with 25 significant figures (e.g. 123456.7890123456789012345) and seems even double can not handle figures like that.

  Are there any simple way in VB.NET to handle these kind of numbers? except cut the numbers into parts.

  Thanks.

Regs,
Bezier
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Question by:bezier98
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3 Comments
 
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by:
checoo earned 250 total points
ID: 12167767
use decimal it can handle upto 28 significant figures
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by:123654789987
123654789987 earned 250 total points
ID: 12168389
The decimal data type

decimal data type variables can store 1 times 10 to the 28th 1.0 × 10-28 and 7.9 times 10 to the 28 th 7.9 × 1028 in 128 bit. If you think about this type you will note that it has a greater precision and a smaller range and that’s we exactly needs for financial calculations also note that decimal data type has a Precision of 28-29 significant digits.
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Author Comment

by:bezier98
ID: 12214604
Acutally I did use decimal type, but at the begining, it doesn't work, but now I know the reason.

I try the following

Dim x as decimal

x = "123456.7890123456789012345"
msgbox (x + 0.0000000000000000001)

the result will turn out to be 12345.789012346

which I think VB treated 0.0000000000000000001 as double

After assigned 0.0000000000000000001 to another decimal y, then
msgbox(x + y) will give the exact answer

Anyway, thanks for helping

Bezier
0

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