How do you approach FizzBuzz?

Check divisibility by 15 first (since 15 = 3 * 5).

What is the optimal solution to FizzBuzz?

String Concatenation. Build the output string by checking divisibility conditions.

What is the time complexity of FizzBuzz?

Time complexity: O(n). Space complexity: O(n) for the result array.

What are common mistakes on FizzBuzz?

Overflowing at an intermediate step even though the final answer fits. Assuming a modulo is non-negative. In most languages -1 % n is negative, which breaks cyclic indexing. Testing floating-point values for exact equality where integer arithmetic would have been exact.

FizzBuzz - Easy Coding Challenge

Given an integer n, return a string array answer (1-indexed) where:

answer[i] == "FizzBuzz" if i is divisible by 3 and 5.
answer[i] == "Fizz" if i is divisible by 3.
answer[i] == "Buzz" if i is divisible by 5.
answer[i] == i (as a string) if none of the above conditions are true.

FizzBuzz

Description

Constraints

FizzBuzz: approach, complexity and pitfalls

The pattern: Math

If you are stuck

The optimal approach

Common Math mistakes