FizzBuzz

📌 Definition:

📖 Detailed Explanation:

Check the combined case first (divisible by 15, or by both 3 and 5), otherwise the 3-check fires before the combined case. A cleaner variant builds a string from the applicable rules and prints the number only when the string is empty — extensible and bug-free. O(n).

💻 Solutions:

• Java
• JavaScript
• Python

public static void fizzBuzz(int n) {
    for (int i = 1; i <= n; i++) {
        String out = "";
        if (i % 3 == 0) out += "Fizz";
        if (i % 5 == 0) out += "Buzz";
        System.out.println(out.isEmpty() ? String.valueOf(i) : out);
    }
}

function fizzBuzz(n) {
  for (let i = 1; i <= n; i++) {
    let out = '';
    if (i % 3 === 0) out += 'Fizz';
    if (i % 5 === 0) out += 'Buzz';
    console.log(out || i);
  }
}

def fizz_buzz(n):
    for i in range(1, n + 1):
        out = ('Fizz' if i % 3 == 0 else '') + ('Buzz' if i % 5 == 0 else '')
        print(out or i)

🔑 Key Points:

• Check the 15 case first, or build a string of rules
• Use % for divisibility
• String-building form scales to more rules
• O(n)

🌍 Real-World Example: