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Floating point numbers with Direct Access connection

Posted on 1999-01-05
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Last Modified: 2013-11-23
Most floating point numbers look weird in SQL Explorer.
If I have 2.1 in Access table, it becames something like 2.099999999187487325. I use Delphi 4.02/Access 97.
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Question by:eugenem
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4 Comments
 
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Expert Comment

by:rwilson032697
ID: 1354728
This is because floating point values are only represented approximately by the floating point numeric types. 2.099999999187487325 will be the closest approximation to 2.1 that the particular field in the table you are viewing can manage. If displayed to 1 decimal place you would get 2.1.

This is a fundamental problem with floating point number representation and manipulation in software development and you need to be aware of this to avoid certain problems and pitfalls.

Cheers,

Raymond.
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by:eugenem
ID: 1354729
So what could I do in this case?
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Author Comment

by:eugenem
ID: 1354730
I was needed to change Precision property of corresponding TField to some small value.
Question is closed.
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rwilson032697 earned 100 total points
ID: 1354731
I believe my answer stands. It did contain the reference to displaying to one decimal place...

Raymond.
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