Question

I have a value like this:

421.18834

And I have to round it mathematical correctly with a mask which can look like this:

0.05
0.04
0.1

For example, if the mask is 0.04, i have to get the value 421.20, because .18 is nearer at .20 than .16.

All functions that I found using Google didn’t work.

Can you please help me?

Answer 1

double initial = 421.18834;
double range = 0.04;

int factor = Math.round(initial / range); // 10530 - will round to correct value

double result = factor * range; // 421.20