Java > Array-2 > fizzBuzz (CodingBat Solution)

Problem:

This is slightly more difficult version of the famous FizzBuzz problem which is sometimes given as a first problem for job interviews. (See also: FizzBuzz Code.) Consider the series of numbers beginning at start and running up to but not including end, so for example start=1 and end=5 gives the series 1, 2, 3, 4. Return a new String[] array containing the string form of these numbers, except for multiples of 3, use "Fizz" instead of the number, for multiples of 5 use "Buzz", and for multiples of both 3 and 5 use "FizzBuzz". In Java, String.valueOf(xxx) will make the String form of an int or other type. This version is a little more complicated than the usual version since you have to allocate and index into an array instead of just printing, and we vary the start/end instead of just always doing 1..100.

fizzBuzz(1, 6) → {"1", "2", "Fizz", "4", "Buzz"}
fizzBuzz(1, 8) → {"1", "2", "Fizz", "4", "Buzz", "Fizz", "7"}
fizzBuzz(1, 11) → {"1", "2", "Fizz", "4", "Buzz", "Fizz", "7", "8", "Fizz", "Buzz"}


Solution:

public String[] fizzBuzz(int start, int end) {
    int n = end - start;
    String[] result = new String[n];
 
    int pos = 0;
    for (int i = start; i < end; i++) {
        boolean fizz = i % 3 == 0;
        boolean buzz = i % 5 == 0;
 
        if (fizz && buzz) result[pos] = "FizzBuzz";
        else if (fizz) result[pos] = "Fizz";
        else if (buzz) result[pos] = "Buzz";
        else result[pos] = String.valueOf(i);
        pos++;
    }
    return result;
}


10 comments :

  1. public String[] fizzBuzz(int start, int end) {
    String[] result = new String[end - start];
    for (int i = start; i < end; i++){
    if(i % 3 != 0 && i % 5 != 0){
    result[i - start] = String.valueOf(i);
    }
    if(i % 3 == 0){
    result[i - start] = "Fizz";
    }
    if(i % 5 == 0){
    result[i - start] = "Buzz";
    }
    if(i % 3 == 0 && i % 5 == 0){
    result[i - start] = "FizzBuzz";
    }
    } return result;
    }

    ReplyDelete
  2. String[] nwarr = new String[end-start];

    for(int i=0; i<nwarr.length; i++){
    if(start % 3 == 0 && start % 5 == 0) nwarr[i] = "FizzBuzz";
    else if(start % 5 == 0) nwarr[i] = "Buzz";
    else if(start % 3 == 0) nwarr[i] = "Fizz";
    else {
    nwarr[i] = String.valueOf(start);
    }
    start++;
    }

    return nwarr;

    ReplyDelete
  3. int diff = end - start;

    String[] res = new String[diff];
    int index = 0;
    for (int i = start; i < end; i++) {
    if (i % 5 == 0 && i % 3 == 0) {
    res[index] = "FizzBuzz";
    index++;
    }
    else if (i % 3 == 0) {
    res[index] = "Fizz";
    index++;
    } else if (i % 5 == 0) {
    res[index] = "Buzz";
    index++;
    } else {
    res[index] = String.valueOf(i);
    index++;
    }
    }
    return res;
    }

    ReplyDelete
  4. public String[] fizzBuzz(int start, int end) {
    String[] result = new String[end-start];
    for (int i = start; i < end; i++) {
    if ( i%3 == 0 && i%5 == 0 ) {
    result[i-start] = "FizzBuzz";
    } else if ( i%3 == 0 ) {
    result[i-start] = "Fizz";
    } else if ( i%5 == 0 ) {
    result[i-start] = "Buzz";
    } else {
    result[i-start] = String.valueOf(i);
    }
    }
    return result;
    }

    ReplyDelete
  5. public String[] fizzBuzz(int start, int end) {


    String[] fizzB = new String[end-start];


    for (int i = start, j=0; i < end; i++, j++) {

    fizzB[j] = String.valueOf(i);

    if (i % 3 == 0 && i % 5 == 0) {

    fizzB[j] = "FizzBuzz";

    } else if (i % 3 == 0) {
    fizzB[j] = "Fizz";

    } else if (i % 5 == 0) {

    fizzB[j] = "Buzz";

    }

    }

    return fizzB;

    ReplyDelete
  6. String arr[] = new String[end-start];
    for(int i = 0;i<arr.length;i++)
    {
    arr[i] = String.valueOf(start+i);
    if((start+i)%3==0)arr[i] = "Fizz";
    if((start+i)%5==0)arr[i] = arr[i].replaceAll("\\d","") + "Buzz";
    }
    return arr;

    ReplyDelete
  7. public String[] fizzBuzz(int start, int end) {
    String[] ret = new String[end - start];
    for (int i = start; i < end; i++)
    ret[i - start] = i % 3 == 0 ? (i % 5 == 0 ? "FizzBuzz" : "Fizz") : (i % 5 == 0 ? "Buzz" : String.valueOf(i));
    return ret;
    }

    ReplyDelete
  8. public String[] fizzBuzz(int start, int end) {
    String[] res = new String[end-start];
    for (int i=0; i<res.length; i++) {
    if (start%3==0) {
    if (start%5==0) res[i] = "FizzBuzz";
    else res[i] = "Fizz";
    }
    else if (start%5==0) res[i] = "Buzz";
    else res[i] = String.valueOf(start);
    start++;
    }
    return res;
    }

    ReplyDelete
  9. public String[] fizzBuzz(int start, int end) {
    String[] result = new String[end-start];

    for(int i=start; i<end; i++){
    String value = "";

    if(i%3==0) value += "Fizz";
    if(i%5==0) value += "Buzz";
    if(value=="") value = i+"";

    result[i-start]=value;
    }

    return result;
    }

    ReplyDelete
  10. public String[] fizzBuzz(int start, int end) {
    String[] result = new String[end - start];
    for (int i = start; i < end; i++){
    if(i % 15 != 0){
    result[i - start] = String.valueOf(i);
    }
    if(i % 3 == 0){
    result[i - start] = "Fizz";
    }
    if(i % 5 == 0){
    result[i - start] = "Buzz";
    }
    if(i % 15 == 0){
    result[i - start] = "FizzBuzz";
    }
    } return result;
    }

    ReplyDelete

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