🧮 Challenge 2: Terminal Calculator

This is a fully-featured Python calculator built for the CodingUnited Challenge 2. It runs in the terminal and supports full math expressions, scientific notation, advanced math functions, and even fun Easter egg commands!

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🚀 Features

✅ Core Functionality

• Supports full expressions (e.g., 3 + 4 * 2, (5 + 2) * 3)
• Handles order of operations, parentheses, exponents (^ or **)
• Uses built-in math functions: sqrt(), sin(), cos(), tan()
• Constants like pi, e
• Scientific notation (1e-3 + 2.5e2)
• Use ans to reference the previous result

✅ Commands

Command	Description
help	Show command and usage instructions
clear	Clear memory and history
history	Show past calculations
exit	Exit the calculator

✅ Fun Commands 🎲

Command	Result
flip a coin	🪙 Heads or Tails
roll a die	🎲 Random number 1–6
magic 8-ball	🎱 Random yes/no style answer

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🎨 User Experience

• Clean prompts and user-friendly messages
• Colored output using colorama
• Rounded results (4 decimal places)
• Saves full history to calc_history.txt with timestamps

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📁 Files

File	Purpose
calculator.py	Main calculator script
calc_history.txt	Auto-generated log of sessions
README.md	Project overview and instructions

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🧪 Run Instructions

Requirements

• Python 3.x
• colorama library (install with pip install colorama)

How to Run

python calculator.py