DnR - 5 months ago 23

Vb.net Question

I have code as below:

`Dim num1 As Integer`

Dim num2 As Integer

num1 = 12.5

num2 = 17.5

When I output the values, I get this:

`num1: 12`

num2: 18

If

`12.5`

`12`

`17.5`

`17`

Or if

`17.5`

`18`

`12.5`

`13`

I'm pretty new in Visual Basic, and it's hard to find any reference on this.

Answer

This is because `VB`

use **bankerâ€™s rounding (round-to-even rule)** as stated in Integer documentation

In this method, when the remainder at the rounding position is `.5`

, that number is **rounded up** when the number before it **is odd**, and **rounded down** when the number before it **is even**.

For example, using round-to-even rule

```
2.5 round down to the even number 2.0,
3.5 would round up to the even number 4.0
```