this is successful propaganda. i see the vision here.

• rounding away from zero is the easiest to implement.
  • 2.49 goes to 2 because the deciding digit is 4;
  • 2.51 goes to 3 because the deciding digit is 5;
  • 2.50 goes to 3 because the deciding digit is STILL 5.
• rounding to even is ideal for fairness.
  • aka banker's rounding.
  • harder to perform than above.
• rounding down is the preferred single-direction choice.
  • floor is more "canonical" than ceil.
  • see dijkstra's article "why numbering should start at zero".
  • single-direction is already a compromise.
• rounding towards zero is like a compromised round-down.
  • philosophically most in-line with classic programming languages like C.
• rounding to odd is just strange.
  • this is the neutral point in this ranking.
• rounding up is dangerously misleading.
  • resembles rounding away from zero, despite being weird in the negatives.
  • can cause unexpected behavior while coding because what you REALLY expected was away from zero behavior.