What’s the difference between round up, round down, round half down and round half up?

Rounding can be tricky, especially when you are dealing with negative numbers

What is Rounding?

Should I care about rounding at all? If you’ve heard round-up round-half-down floor ceiling , then you already know it to some degree. 👇 is the Wikipedia explanation:

Rounding means replacing a number with an approximate value that has a shorter, simpler, or more explicit representation. For example, replacing $23.4476 with…