CODEWITHSUNDEEP
javamathintegerrounding
heisenbergman
heisenbergman

Reputation: 1449

How would one round any integer to the next highest hundred in Java?

To illustrate, I'd like to find out what the best way is to round the following integers:

(integer) -> (rounded value)

9 -> 100

200 -> 200

201 -> 300

1367 -> 1400

...so on and so forth... any suggestions on what would be the best way to accomplish this using Java?

Upvotes: 1

Views: 1568

Answers (4)

Ravi K Thapliyal
Ravi K Thapliyal

Reputation: 51711

Using Math#ceil()

int[] ints = {9, 200, 201, 1367, 90210};

int[] rounded = new int[5];
for (int i = 0; i < ints.length; i++) {
    rounded[i] = (int) (Math.ceil(ints[i]/100f) * 100f);
}

// prints: [100, 200, 300, 1400, 90300]
System.out.println(Arrays.toString(rounded));

Upvotes: 0

Srinath Ganesh
Srinath Ganesh

Reputation: 2558

int d = num % 100;
num = num+100-d

Upvotes: 0

C. K. Young
C. K. Young

Reputation: 223043

public static int ceil100(int num) {
    return (num + 99) / 100 * 100;
}

Granted, not efficient, but still. The answers posted by others work too:

public static int ceil100(int num) {
    return num + 100 - num % 100;
}

Upvotes: 0

Kon
Kon

Reputation: 10810

Determine the modulus by 100

int k = 1234;
int mod = k % 100; //mod = 34
int difference = 100 - mod; //difference = 66
k += difference;

Straightforward.

Upvotes: 3

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