Menu

Tech

English

Recap - Repeating Code

Part of the Fundamentals section of Coddy's Dart journey — lesson 47 of 94.

Challenge

Medium

In this challenge, you'll create a "FizzBuzz" program - a classic coding exercise that combines loops and conditional statements.

Write a program that:

Takes an integer n as input
Uses a loop to iterate from 1 to n
For each number:
- If it's divisible by 3, print "Fizz"
- If it's divisible by 5, print "Buzz"
- If it's divisible by both 3 and 5, print "FizzBuzz"
- Otherwise, just print the number
After the loop finishes, print the count of how many "Fizz", "Buzz", and "FizzBuzz" were printed

Example output for n = 15:

1
2
Fizz
4
Buzz
Fizz
7
8
Fizz
Buzz
11
Fizz
13
14
FizzBuzz
Fizz count: 4
Buzz count: 3
FizzBuzz count: 1

Try it yourself

import 'dart:io';

void main() {
  // Read the input number
  String? input = stdin.readLineSync();
  int n = int.parse(input!);
  
  // Initialize counters
  int fizzCount = 0;
  int buzzCount = 0;
  int fizzBuzzCount = 0;
  
  // Implement the FizzBuzz loop from 1 to n
  for (int i = 1; i <= n; i++) {
    bool divisibleBy3 = i % 3 == 0;
    bool divisibleBy5 = i % 5 == 0;
    
    // TODO: Complete the loop
  }
  
  // TODO: Print the counts at the end
}

All lessons in Fundamentals

1Introduction to Dart

What is Dart?The main Function Printing Output Code Comments

4Operators Part 2

Comparison Operators Logical AND Logical OR Logical NOT Type Test Operators Recap - Making Comparisons

7Working with Strings

String Concatenation String Interpolation Multi-line Strings String Properties Basic String Methods

10Collections - Maps Basics

What are Maps?Creating a Map Accessing Values by Key Key-Value Pairs Getting Map Size Getting Keys Getting Values Checking if a Key Exists

13Null Safety In Depth

Understanding Null Nullable Types Non-Nullable Types Null Assertion Operator Late Initialization Recap - Handling Null Safely

16Fundamentals Challenges

Challenge: List of calculation Challenge: Sum of numbers Challenge: Find product

2Variables and Basic Data Types

What are Variables?Strings Integers (int)Doubles (double)Booleans (bool)Type Inference with 'var'Final Variables Constant Variables Naming Conventions Basic Null Safety Recap - Declaring Variables

5Operators Part 3

Null-aware Operator Null-aware Access Conditional Operator

8Control Flow - Loops

The 'for' Loop The 'while' Loop The 'do-while' Loop Using 'break' in Loops Using 'continue' in LoopsRecap - Repeating Code

11Functions Basics

What are Functions?Defining a Basic Function Calling a Function Functions with Parameters Functions Returning Values The 'void' Keyword Arrow Syntax Recap - Simple Functions

14Type Conversion

Converting String to int Converting String to double Converting Numbers to String Handling Conversion Errors

3Operators Part 1

Arithmetic Operators Integer Division Modulo Operator Increment and Decrement Assignment Shortcuts Recap - Simple Calculations

6Control Flow - Decision Making

The 'if' Statement The 'else' Statement The 'else if' Statement Recap - Simple Decisions Nested 'if' Statements The 'switch' Statement

9Collections - Lists Basics

What are Lists?Creating a List Accessing by Index Getting List Length Adding Elements Removing Elements Checking if a List is Empty Iterating Over a List

12Functions Advanced

Optional Positional Parameters Named Parameters Required Named Parameters Default Parameter Values Recap - Function Parameters

15Project: Simple Calculator

Setting Up Declaring Number

Project lesson

Creating an Operation

Project lesson

Performing Calculation

Project lesson

Displaying Result

Project lesson