First Year Computer Science Learning Roadmap

Learn

• What is Computer Science?
• Computational Thinking & Problem Solving
• Introduction to Python
• Variables, Data Types (int, float, str, bool)
• Basic Input/Output (print(), input())
• Arithmetic Operators

Practice & build

• Set up Python development environment.
• Write a 'Hello, World!' program.
• Create a program to calculate simple arithmetic expressions.
• Write a program that takes user's name and prints a greeting.

Learn

• Comparison Operators & Boolean Logic
• Conditional Statements (if, elif, else)
• Loops (for loop, while loop)
• Break and Continue statements

Practice & build

• Build a simple 'guess the number' game.
• Write a program that checks if a number is even or odd.
• Implement a loop to print numbers from 1 to 10.
• Calculate the factorial of a number using a loop.

Learn

• Defining and Calling Functions
• Function Parameters and Arguments
• Return Values
• Local vs. Global Scope
• Introduction to Recursion (simple examples)

Practice & build

• Refactor previous programs by extracting logic into functions.
• Write functions for common mathematical operations (e.g., 'add', 'subtract').
• Implement a recursive function for Fibonacci sequence or factorial.
• Create a module with a few utility functions.

Learn

• Introduction to Lists
• List Indexing, Slicing, and Methods (append, insert, remove, sort)
• List Comprehensions (basic)
• Introduction to Tuples (immutable sequences)

Practice & build

• Create a program to manage a To-Do list (add, view, remove items).
• Write a script to find the maximum/minimum value in a list.
• Sort a list of numbers or strings.
• Use tuples to store coordinates or immutable records.

Learn

• Introduction to Dictionaries (key-value pairs)
• Dictionary Operations (add, retrieve, update, delete)
• Dictionary Methods (keys(), values(), items())
• Introduction to Sets (unique, unordered collections)
• Set Operations (union, intersection, difference)

Practice & build

• Build a simple contact book using a dictionary.
• Create a program to count word frequencies in a sentence using dictionaries.
• Use sets to find unique elements in a list or common elements between two lists.
• Implement a basic 'lookup' system (e.g., student grades).

Learn

• Reading from Text Files (open(), read(), readline(), readlines(), close())
• Writing to Text Files
• Context Managers (with open() as file)
• Understanding Exceptions
• Handling Exceptions (try-except blocks)
• Common Exception Types

Practice & build

• Write a program that reads data from a text file and processes it.
• Create a script to write user-generated content to a file.
• Implement error handling for potential file not found errors.
• Add try-except blocks to user input validation loops.

Learn

• What is OOP? (Concepts: objects, classes)
• Defining Classes and Creating Objects
• Attributes (instance and class variables)
• Methods (instance methods, `self` parameter)
• Constructors (`__init__` method)

Practice & build

• Define a simple class like 'Car' or 'Person' with attributes and methods.
• Create multiple objects (instances) from the defined class.
• Implement a method that modifies an object's attribute.
• Design a class for a bank account with deposit/withdraw methods.