Investment and Bond Calculator

This Python script provides a simple investment and bond calculator. Users can calculate the amount of interest they will earn on an investment or the amount they will have to pay on a home loan (bond).

Getting Started

Prerequisites

• Python 3.x installed on your system.

Running the Script

1. Clone the repository or download the script file investment_bond_calculator.py.
2. Open your terminal or command prompt.
3. Navigate to the directory where investment_bond_calculator.py is located.
4. Run the script using the command: python investment_bond_calculator.py

How to Use

Upon running the script, you will be presented with a menu with two options: investment or bond. Follow the on-screen instructions to input the required information.

Investment Calculator

• Calculate the amount of interest you'll earn on your investment.
• Input the following details:
  • Deposit Amount (£)
  • Interest Rate (%)
  • Number of Years

You will then be asked if you want to calculate simple or compound interest. The script will calculate and display the total amount earned after the specified number of years.

Bond Calculator

• Calculate the amount you'll have to pay on a home loan (bond).
• Input the following details:
  • Present Value of the House (£)
  • Interest Rate (%)
  • Number of Months to Repay

The script will calculate and display the monthly repayment amount for the home loan.

Sample Code

import math

LINE = "-"*80
HOME_MENU = '''\tWelcome to the investment calculator!\n \n \
    \tinvestment - to calculate the amount of interest you'll earn on your investment\n \
    \tbond       - to calculate the amount you'll have to pay on a home loan\n '''

# user can choose between investment or bond calculator
print(f"{HOME_MENU}\n\t{LINE}")

while True:
    choice = input("\tEnter either 'investment' or 'bond' from the menu above to proceed: ").lower()

    if choice == "investment":
        print("\n\n\tYou've chosen to calculate the amount of interest you'll earn on your investment.")
        
        # user inputs the data needed to calculate investment
        while True:
            deposit_amount = input("\n\tEnter the amount of money you're depositing (£): ")
            # More input validation and calculation code...

    elif choice == "bond":
        print("\n\n\tYou've chosen to calculate the amount you'll have to pay on a home loan.")
        # More input validation and calculation code...

    elif not choice.isalpha() or choice not in ["investment", "bond"]:
        print("\n\n\tInvalid choice! Please select either 'investment' or 'bond' from the options above.")

Contribution

Contributions are welcome! If you have any suggestions, improvements, or feature requests, feel free to open an issue or create a pull request.