Java - Round up 5.1 to 6

Question

I am trying to round up 5.1 to the next whole number. I tried using math round, but it only rounds it to 6 if the value is 5.5 or over.

    int value = 51;
    double dataPerPage = 10;

    double amountOfPages = (double) value / dataPerPage;
    System.out.println(value + "/" + dataPerPage + " = " + amountOfPages);

    int sum = (int) Math.round(amountOfPages);
    System.out.println("Total: " + sum);

Use `Math.ceil`? Or, since it's integer math with positive numbers: `(value + dataPerPage - 1) / dataPerPage`. — Andy Turner, Nov 22 '17 at 15:35

score 1 · Answer 1 · answered Nov 22 '17 at 15:45

1

Use Math.ceil() in this case

int sum = (int) Math.ceil(amountOfPages);
System.out.println("Total: " + sum);

answered Nov 22 '17 at 15:45

Justin Sp

17
2

Java - Round up 5.1 to 6

1 Answers1