Hi ,
I want to round the my floating point result into nearest halfpoint
.how to do it.
Example:
1)My floating point result is 3.3
i want it become 3.5
2) My floating point result is 3.6
i want it become 4
How can we do it
On 26 May 2010 15:09, Robert K. [email protected] wrote:
robert
Arf, you answered before I did finish my answer.
… was looking the exact names for rounding in BigDecimal.mode …
Regards,
B.D.
2010/5/26 Lucky Nl [email protected]:
I want to round the my floating point result into nearest halfpoint
.how to do it.
Example:
1)My floating point result is 3.3
i want it become 3.5
2) My floating point result is 3.6
i want it become 4
If you are rounding then 3.6 should yield 3.5 because (3.6 - 3.5) <<
(4 - 3.6). Otherwise you want the ceiling function.
How can we do it
irb(main):012:0> [3.3, 3.6].map {|x| (x * 2).round / 2.0}
=> [3.5, 3.5]
irb(main):014:0> [3.3, 3.6].map {|x| (x * 2).ceil / 2.0}
=> [3.5, 4.0]
Btw, I would rather not round float values and use them as they are.
If at all I would usually only round them for output.
Cheers
robert