Fun Python Projects

This repository contains two small Python programs I wrote in high school, mostly for fun and as a way to practice programming. They are independent of each other and can be run separately.

• 4x4-sudoku_solver.py – a solver for 4×4 Sudoku puzzles (with or without 2×2 sub-squares).
• launching_projectiles_solver.py – a physics-based calculator for projectile motion when launching from a cliff.

Both are standalone scripts written in Python, and require only the standard library.

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1. 4×4 Sudoku Solver

This program attempts to solve a 4×4 Sudoku puzzle.

• By default, it enforces 2×2 sub-square rules in addition to row/column uniqueness.
• If you want a version without sub-squares, comment out lines 49–64 and 120–132 of the file.

Usage

Run the solver with:

python3 4x4-sudoku_solver.py

You will be prompted to enter the puzzle row by row. Use:

• Numbers 1–4 for filled cells
• x for an empty cell
• Spaces between entries

Example input row:

x x 1 2

The program will output all valid solutions, or notify you if none exist.

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2. Launching Projectiles Solver

This script computes flight characteristics of a projectile launched from a height with an initial velocity and angle.

It calculates:

• Airtime
• Horizontal distance traveled
• Impact velocity
• Impact angle (below the horizontal)

Usage

Open launching_projectiles_solver.py and modify the parameter values near the top of the file:

heightover = 1.17   # Launch height above ground (m)
velocity   = 8.123  # Initial speed (m/s)
angle      = 30     # Launch angle (degrees)
gravity    = 9.8    # Gravitational acceleration (m/s^2)

Then run:

python3 launching_projectiles_solver.py

The program prints the results rounded to two decimal places.

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Requirements

• Python 3.x
• No external dependencies (uses only the standard library)

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License

This repository is shared for educational and personal hobby use. Feel free to explore, adapt, and modify.