java - Check if round up or down?

Question

I'm handling with some numbers and I want to add to the rounded number a specific faktor.

Like:

if round down -> add 150 if round up -> add 100

Is there any possibility to check if the computer is rounding up or down?

Answer 1

你可以知道你是像这样向上还是向下取整

float roundedNbr = Math.round(originalNbr);

if(roundedNbr < originalNbr) {
    // We rounded down
} else if (roundedNbr > originalNbr) {
    // We rounded up
} else {
    // No rounding
}