“Rounding1” (Solution)

Answer

| Number | Round | Floor | Ceiling | Truncate | Format |
|   -2.9 |    -3 |    -3 |      -2 |       -2 |     -3 |
|   -0.5 |     0 |    -1 |       0 |        0 |     -1 |
|    0.3 |     0 |     0 |       1 |        0 |      0 |
|    1.5 |     2 |     1 |       2 |        1 |      2 |
|    2.5 |     2 |     2 |       3 |        2 |      3 |
|    2.9 |     3 |     2 |       3 |        2 |      3 |

Explanation

If the number is exactly halfway between two possibilities, the following rules will work:

• Math.Round rounds to the nearest even integer (by default).

• Math.Floor rounds down towards the negative infinity.

• Math.Ceiling rounds up towards the positive infinity.

• Math.Truncate rounds down or up towards zero.

• String.Format rounds towards the number away from zero.

Links

• Standard Numeric Format Strings

• Custom Numeric Format Strings

Problem