Fizz Buzz

Your task is to write a Rust program that implements the classic programming challenge known as FizzBuzz.

You are given a function fizz_buzz(num: u32) -> String that takes a single parameter num of type u32 and returns a String.

Your job is to return a string based on the following rules:

Return "Fizz" for numbers that are multiples of 3.
Return "Buzz" for numbers that are multiples of 5.
Return "FizzBuzz" for numbers that are multiples of both 3 and 5.
Return the number itself for all other numbers.

Example

Here's how the behavior of the function should look like:

assert_eq!(fizz_buzz(1), "1");
assert_eq!(fizz_buzz(2), "2");
assert_eq!(fizz_buzz(3), "Fizz");
assert_eq!(fizz_buzz(4), "4");
assert_eq!(fizz_buzz(5), "Buzz");
assert_eq!(fizz_buzz(6), "Fizz");
assert_eq!(fizz_buzz(7), "7");
assert_eq!(fizz_buzz(8), "8");
assert_eq!(fizz_buzz(9), "Fizz");
assert_eq!(fizz_buzz(10), "Buzz");
assert_eq!(fizz_buzz(11), "11");
assert_eq!(fizz_buzz(12), "Fizz");
assert_eq!(fizz_buzz(13), "13");
assert_eq!(fizz_buzz(14), "14");
assert_eq!(fizz_buzz(15), "FizzBuzz");

Good luck, and happy coding!

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Solutions

Christopher Nielson

c-nielson

3 days ago

2.89ms

86.70kb

pub fn fizz_buzz(num: u32) -> String {
    let mut result = String::new();
    if num % 3 == 0 {
        result.push_str("Fizz");
    }
    if num % 5 == 0 {
        result.push_str("Buzz");
    }
    if result.is_empty() {
        result.push_str(&num.to_string());
    }
    
    result
}

SeinPierre

4 days ago

3.57ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    match (num%3,num%5) {
        (0,0) => String::from("FizzBuzz"),
        (0,_) => String::from("Fizz"),
        (_,0) => String::from("Buzz"),
        (_,_) => num.to_string(),
    }
}

Donald Huber-Youmans

dHuberYoumans

5 days ago

3.08ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    match num {
        n if (n%3 == 0) && (n%5 != 0) => "Fizz".to_string(), 
        n if (n%3 != 0) && (n%5 == 0) => "Buzz".to_string(), 
        n if (n%3 == 0) && (n%5 == 0) => "FizzBuzz".to_string(),
        _ => num.to_string()
    }
}

Elliott Draper

ejdraper

7 days ago

2.94ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    if num % 3 == 0 && num % 5 == 0 {
        return "FizzBuzz".to_string();
    }
    if num % 3 == 0 {
        return "Fizz".to_string();
    }
    if num % 5 == 0 {
        return "Buzz".to_string();
    }
    return num.to_string();
}

Whisper_icoma

1378046967

7 days ago

3.22ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    match(num % 3 == 0, num % 5 == 0){
        (true, false) => String::from("Fizz"),
        (true, true)  => String::from("FizzBuzz"),
        (false, true) => String::from("Buzz"),
        (_, _) => num.to_string()
    }
}

Jonathan Voss

jvoss

8 days ago

3.87ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    match (num % 3 == 0, num % 5 == 0) {
        (true, false) => String::from("Fizz"),
        (true, true)  => String::from("FizzBuzz"),
        (false, true) => String::from("Buzz"),
        (_, _) => num.to_string()
    }
}

0xMushow

8 days ago

3.57ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    match (num % 3 == 0, num % 5 == 0) {
        (true, true) => "FizzBuzz".to_string(),
        (true, false) => "Fizz".to_string(),
        (false, true) => "Buzz".to_string(),
        (false, false) => num.to_string(),
    }
}

エヴァンゲリオン

Lu-zihang

10 days ago

3.07ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    let div_by_3 = num % 3 == 0;
    let div_by_5 = num % 5 == 0;
    match (div_by_3, div_by_5) {
        (true, true) => "FizzBuzz".to_string(),
        (true, false) => "Fizz".to_string(),
        (false, true) => "Buzz".to_string(),
        (false, false) => format!("{}", num),
    }
}

Sthitaprajna Sahu

sthitasahu

12 days ago

4.00ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    if num % 5== 0 && num%3==0 {
        "FizzBuzz".to_string()
    } else if num % 3 == 0 {
        "Fizz".to_string()
    } else if num % 5 == 0 {
        "Buzz".to_string()
    } else {
        num.to_string()
    }
}

Sthitaprajna Sahu

sthitasahu

12 days ago

4.31ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    if num % 15 == 0 {
        "FizzBuzz".to_string()
    } else if num % 3 == 0 {
        "Fizz".to_string()
    } else if num % 5 == 0 {
        "Buzz".to_string()
    } else {
        num.to_string()
    }
}

Florian Gaudin-Delrieu

FlorianGD

12 days ago

2.95ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    if num % 15 == 0 {
        "FizzBuzz".to_string()
    } else if num % 3 == 0 {
        "Fizz".to_string()
    } else if num % 5 == 0 {
        "Buzz".to_string()
    } else {
        num.to_string()
    }
}

Toshikazu Fukushima

fukushima-toshi-exnoa

12 days ago

3.54ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    if num % 15 == 0 {
        return String::from("FizzBuzz");
    } else if num % 3 == 0 {
        return String::from("Fizz");
    } else if num % 5 == 0 {
        return String::from("Buzz");
    }
    num.to_string()
}

Takuro Niitsuma

otakumesi

13 days ago

4.92ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    match num % 15 {
        0 => "FizzBuzz".to_string(),
        3 | 6 | 9 | 12 => "Fizz".to_string(),
        5 | 10 => "Buzz".to_string(),
        _ => num.to_string(),
    }
}

raydive

14 days ago

2.92ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    if num % 15 == 0 {
        "FizzBuzz".to_string()
    } else if num % 3 == 0 {
        "Fizz".to_string()
    } else if num % 5 == 0 {
        "Buzz".to_string()
    } else { num.to_string() }
}

dawwestk

14 days ago

2.92ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    let div_by_3 = num % 3 == 0;
    let div_by_5 = num % 5 == 0;
    match (div_by_3, div_by_5) {
        (true, true) => "FizzBuzz".to_string(),
        (true, false) => "Fizz".to_string(),
        (false, true) => "Buzz".to_string(),
        (false, false) => format!("{}", num),
    }
}

Enriko

rix71

15 days ago

17.47ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    let m3 = num % 3 == 0;
    let m5 = num % 5 == 0;
    if m3 && m5 {
        return "FizzBuzz".into();
    } else if m3 {
        return "Fizz".into();
    } else if m5 {
        return "Buzz".into();
    } else {
        return num.to_string();
    }
}

PangoSea

kapaseker

16 days ago

4.56ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    if num % 15 == 0 {
        "FizzBuzz".to_string()
    } else if num % 5 == 0 {
        "Buzz".to_string()
    } else if num % 3 == 0 {
        "Fizz".to_string()
    } else {
        num.to_string()
    }
}

Dhananjay Pandit

djpandit007

20 days ago

3.74ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    if (num % 3 == 0) && (num % 5 == 0) {
        return String::from("FizzBuzz");
    } else if num % 3 == 0 {
        return String::from("Fizz");
    } else if num % 5 == 0 {
        return String::from("Buzz");
    } else {
        return num.to_string();
    }
}

Sakura

sakkura

20 days ago

2.98ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    match (num % 3, num % 5) {
        (0, 0) => "FizzBuzz".to_string(),
        (0, _) => "Fizz".to_string(),
        (_, 0) => "Buzz".to_string(),
        _ => num.to_string()
    }
}

Tengz Mao

MaoX-Yu

20 days ago

3.27ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    match (num % 3, num % 5) {
        (0, 0) => "FizzBuzz".to_string(),
        (0, _) => "Fizz".to_string(),
        (_, 0) => "Buzz".to_string(),
        _ => num.to_string(),
    }
}

mm-yyyy

21 days ago

3.91ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    match num {
        num if (num % 3 == 0) && (num % 5 == 0) => "FizzBuzz".to_string(),
        num if num % 3 == 0 => "Fizz".to_string(),
        num if num % 5 == 0 => "Buzz".to_string(),
        _ => num.to_string(),
    }
}

Dominicm99

21 days ago

2.86ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    match (num % 3, num % 5) {
        (0, 0) => "FizzBuzz".to_string(),
        (0, _) => "Fizz".to_string(),
        (_, 0) => "Buzz".to_string(),
        _ => num.to_string(),
    }
}

Ahmet Özcan

ahmetoozcan

21 days ago

3.86ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    match (num % 3, num % 5) {
        (0, 0) => "FizzBuzz".to_string(),
        (0, _) => "Fizz".to_string(),
        (_, 0) => "Buzz".to_string(),
        _ => num.to_string(),
    }
}

Mikhail Shutov

mshutov

22 days ago

4.27ms

86.70kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    if num % 3 != 0 && num % 5 != 0 { return num.to_string(); }
    let mut res = String::new();
    if num % 3 == 0 { res.push_str("Fizz"); }
    if num % 5 == 0 { res.push_str("Buzz"); }
    res
}

Bugra Okumus

bgraokmush

22 days ago

4.49ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    if num % 3 == 0 && num % 5 == 0 { return "FizzBuzz".to_string();} 
    if num % 3 == 0 { return "Fizz".to_string();}
    if num % 5 == 0 { return "Buzz".to_string();}  
    return num.to_string()
}

Pathan Khaleedh Khan

KhaleedhKhan

23 days ago

3.96ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
           match (num % 3 == 0 , num % 5 == 0)  {
        (true,false) => "Fizz".to_string(),
        (false,true) => "Buzz".to_string(),
        (true,true)  => "FizzBuzz".to_string(),
        (false,false) => num.to_string(),
    }
}

Jadoski™

oelun-in

23 days ago

2.77ms

86.72kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    let fizz = "Fizz".to_string() ;
    let buzz = "Buzz".to_string() ;
    let fizzbuzz = "FizzBuzz".to_string();
    if num % 3 == 0 && num % 5 == 0 {
        fizzbuzz
    }
    else if num%3 == 0 {
        fizz
    }
    else if num % 5 == 0 {
        buzz
    }
   
    else {
        num.to_string()
    }
   
}

Sandeep chauhan

ryzen-xp

23 days ago

3.55ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    
    if num %3== 0{
        if num %5== 0 {
            String::from("FizzBuzz")
        }
        else{
            String::from("Fizz")
        }
    }
    else{
        String::from("Buzz")
    }
}

vikingNR

24 days ago

3.11ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    match (num % 3 == 0, num % 5 == 0) {
        (true, true) => String::from("FizzBuzz"),
        (true, false) => String::from("Fizz"),
        (false, true) => String::from("Buzz"),
        _ => num.to_string(),
    }
   // TODO: Implement the FizzBuzz challenge
}

PavelPerna

24 days ago

5.06ms

86.70kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    let mut res = String::from("");
    if num % 3 == 0 {
        res+="Fizz";
    }
    if num % 5 == 0 {
        res+="Buzz";
    }
    res
}

rawar089

24 days ago

3.27ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    match (num % 3 == 0 , num % 5 == 0)  {
        (true,false) => "Fizz".to_string(),
        (false,true) => "Buzz".to_string(),
        (true,true)  => "FizzBuzz".to_string(),
        (false,false) => num.to_string(),
    }
}

Tom Cline

tom-cline

24 days ago

2.86ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    if num%3 != 0 && num%5 != 0 {
        return num.to_string();
    }
    let s = &mut String::new();
    if num%3 == 0 {
        s.push_str("Fizz")
    }
    if num%5 == 0 {
        s.push_str("Buzz")
    }
    
    s.to_string()
}

matsuyama-k1

25 days ago

4.25ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    if num % 15 == 0 {
        return "FizzBuzz".to_string()
    }else if num % 3 == 0 {
        return "Fizz".to_string()
    } else if num % 5 == 0 {
        return "Buzz".to_string()
    }
    return num.to_string()
}

Stan

i2z4

25 days ago

3.12ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    match num {
        i if i % 5 == 0 && i % 3 == 0 => "FizzBuzz".to_string(),
        i if i % 5 == 0 => "Buzz".to_string(),
        i if i % 3 == 0 => "Fizz".to_string(),
        _ => num.to_string()
    }
}

Saint Luang

mynamesent

25 days ago

4.37ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    if num % 3 == 0 && num %5 == 0 {
        return "FizzBuzz".to_string()
    } else if num % 3 == 0 {
        return "Fizz".to_string()
    } else {
        return "Buzz".to_string()
    }
}

Elviskarani

25 days ago

2.83ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
  if num % 15 == 0 {
        return "FizzBuzz".to_string();
    }
    else if num % 3 == 0 {
        return "Fizz".to_string();
    }
    else if num % 5 == 0 {
        return "Buzz".to_string();
    }
    return num.to_string();
}

Vlad

mvldmihai

a month ago

2.81ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    if num % 3 == 0 && num % 5 == 0 {
        "FizzBuzz".to_string()
    }
    else if num % 5 == 0 {
        "Buzz".to_string()
    }
    else if num % 3 == 0 {
        "Fizz".to_string()
    }
    else {
        num.to_string()
    }
}

Mohamed Elkebir

elkebirmed

a month ago

2.88ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    match (num % 3 == 0, num % 5 == 0) {
        (true, true) => String::from("FizzBuzz"),
        (true, false) => String::from("Fizz"),
        (false, true) => String::from("Buzz"),
        _ => num.to_string(),
    }
}

Rickard Jensen

rjensen

a month ago

3.03ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    match (num % 3, num % 5) {
        (0, 0) => "FizzBuzz".to_string(),
        (0, _) => "Fizz".to_string(),
        (_, 0) => "Buzz".to_string(),
        _ => num.to_string()
    }
}

kada-s

sy34

a month ago

3.94ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    match (num % 3 == 0, num % 5 == 0) {
        (true, true) => "FizzBuzz".to_string(),
        (true, false) => "Fizz".to_string(),
        (false, true) => "Buzz".to_string(),
        _ => num.to_string(),
    }
}

zahrajavar

a month ago

2.87ms

86.72kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    let mut s = num.to_string();
    match (num%3 == 0 , num%5 == 0){
        (true, false) => "Fizz".to_string(),
        (false, true) => "Buzz".to_string(),
        (true, true) => "FizzBuzz".to_string(),
        (false, false) => s,
    }
}

Robin Le Caignec

Le-Caignec

a month ago

2.74ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    match (num % 3 == 0, num % 5 == 0) {
        (true, true) => "FizzBuzz".to_string(),
        (true, false) => "Fizz".to_string(),
        (false, true) => "Buzz".to_string(),
        _ => num.to_string(),
    }
}

Zenya Nagata

zenyanagata

a month ago

2.82ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    if num % 15 == 0 {
        return "FizzBuzz".to_string();
    }
    else if num % 3 == 0 {
        return "Fizz".to_string();
    }
    else if num % 5 == 0 {
        return "Buzz".to_string();
    }
    return num.to_string();
}

Yofifi

a month ago

2.82ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    
    if num % 3 == 0 && num % 5 == 0 {
        return "FizzBuzz".to_string()
    } else if num % 3 == 0 {
        return "Fizz".to_string()
    } else if num % 5 == 0 {
        return "Buzz".to_string()
    } else {
    return num.to_string()
    }
}

goerfra

a month ago

2.75ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    match (num%3==0, num%5==0) {
        (true, true) => "FizzBuzz".to_string(),
        (true, false) => "Fizz".to_string(),
        (false, true) => "Buzz".to_string(),
        _ => num.to_string(),
    }
}

ssvv0

a month ago

3.44ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    
    match num {
      num if (num % 3 == 0 && num % 5 == 0) => "FizzBuzz".to_string(),
      num if num % 3 == 0 => "Fizz".to_string(),
      num if num % 5 == 0 => "Buzz".to_string(),
        _ => num.to_string(),
    }
}

karapy

a month ago

2.74ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    if num % 3 == 0 && num % 5 == 0 {
        "FizzBuzz".to_string()
    } else if num % 3 == 0 {
        "Fizz".to_string()
    } else if num % 5 == 0 {
        "Buzz".to_string()
    } else {
        num.to_string()
    }
}

Tarokc

a month ago

3.15ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
    if num % 3 == 0 && num % 5 == 0 {
        return String::from("FizzBuzz")
    }
    else if num % 3 == 0 {
        return String::from("Fizz")
    }
    else if num % 5 == 0 {
        return String::from("Buzz")
    }
    else {
        return num.to_string()
    }
}

Larry Oates

Leafmun-certii

a month ago

2.82ms

86.71kb

pub fn fizz_buzz(num: u32) -> String  {
    // TODO: Implement the FizzBuzz challenge
    if num % 5 == 0 {
        if num % 3 == 0 {
            return String::from("FizzBuzz")
        }
        else {
            return String::from("Buzz")
        }
    }
    else if num % 3 == 0 {
        return String::from("Fizz")
    }
    else {
        num.to_string()
    }
}

aey4

a month ago

3.06ms

86.71kb

pub fn fizz_buzz(num: u32) -> String {
    // TODO: Implement the FizzBuzz challenge
      return match (num%3==0, num%5==0){
        (true, false)=>  "Fizz".to_string(),
        (false, true)=>  "Buzz".to_string(),
        (true, true)=>   "FizzBuzz".to_string(),
        (false, false)=> num.to_string(),
    };
 }