multilingual

A repository of simple mini projects to solidify fundamentals in different programming languages... for the purpose of making sure I am comfortable leetcoding in my languages.

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1. Hello World + Variables Playground

• Concepts: printing, variables, data types, comments
• Project: Print “Hello, World”, then create and print different types of variables (string, int, float, bool).
• Why: Learn syntax basics, variable declarations, and output.

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2. FizzBuzz

• Concepts: loops, conditionals, modulo, printing
• Project: Print numbers 1–100 with "Fizz" if divisible by 3, "Buzz" by 5, and "FizzBuzz" by both.
• Why: Practice logic, control flow, and common LeetCode-style patterns.

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3. Temperature Converter

• Concepts: input/output, arithmetic, functions
• Project: Convert between Celsius and Fahrenheit with user input.
• Why: Gets you working with user interaction and reusable code.

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4. Four Function Calculator

• Concepts: user input, functions, switch/case or if-else, error handling
• Project: A calculator that supports +, -, *, /
• Why: Introduces input validation and combining functions with control flow.

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5. Gradebook System (List + Dict practice)

• Concepts: lists/arrays, dictionaries/maps, iteration
• Project: Store students’ names and grades, calculate averages, print results.
• Why: You’ll practice data structures and traversing them.

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6. Todo List App (Console-based)

• Concepts: CRUD (Create, Read, Update, Delete), loops, input, lists
• Project: Create a todo list where you can add, delete, mark done.
• Why: Teaches state management and simulates how apps store and modify data.

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7. Password Strength Checker

• Concepts: strings, functions, logic, length checking, any()/regex
• Project: User enters a password; you return if it's weak, medium, strong.
• Why: Prepares you for string manipulation problems in LeetCode.

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8. Guess the Number Game

• Concepts: random number generation, loops, input, comparison
• Project: User tries to guess a number until correct, get hints like “too high/low”.
• Why: Engaging and practices loops + conditionals + randomness.

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9. File Reader Summary

• Concepts: file I/O, strings, exception handling
• Project: Read a text file and print the number of lines, words, characters.
• Why: Intro to file manipulation — useful for input-heavy coding problems.

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10. Timer/Stopwatch

• Concepts: system libraries, time/delay functions, loops
• Project: Create a timer that runs for X seconds or a stopwatch that tracks time.
• Why: Teaches interaction with built-in libraries, great for async understanding later.

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11. Mini LeetCode Starter Project

• Project: Implement 3 classic problems:
  1. Reverse a string
  2. Find max in array
  3. Check if a number is prime

12. Data structure practice:

Implement the following:

1. Dyanmic array - resizing
2. Singly linked list - insertion at head/ tail, delete, reverse 2a. Doubly linked list
3. Stack - push(), pop(), peek(), isEmpty()
4. Queue - enqueue(), dequeue(), peek(), isEmpty()
5. Deque - double-ended queue
6. hash map/ hash table
   • handle collisions (chaining/ open addressing)
   • operations: insert, search, delete
   • load factor and resizing
7. Hash set - using a hashmap (key only)
8. Binary tree - preorder, inorder, postorder traversals (recursively and iteratively)
9. BST - insert, search, delete, inorder traversal returns sorted vals
10. Heap (min and max) - using array; insert, remove (heapify up/down)
11. Trie (prefi tree) insert, search, startsWith
12. Graph (adjacency list) 14a. Graph traversals
    • DFS (recursive + iterative)
    • BFS (queue)

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Learning objectives:

Each project builds familiarity in the following

• Variables + Conditionals
• Loops
• Functions
• Data Structures
• File I/O & Libraries

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project ideas designed with assistance from ChatGPT