Exercise 05-12:
Amend the previous program to ask for the monthly amount deposited. This amount will be deposited at the beginning of each month. Include the deposit amount when calculating interest for the following month.
Answer:
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# Python From Scratch
# Author: Nilo Ney Coutinho Menezes
# Editora Novatec (c) 2010-2025 - LogiKraft 2025
# Site: https://pythonfromscratch.com
# ISBN: 978-85-7522-949-1 (Paperback), 978-85-7522-950-7 (hardcover), 978-85-7522-951-4 (ebook)
#
# File: chapter 05/exercise-05-12.py.py
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deposit = float(input("Initial deposit: "))
rate = float(input("Interest rate (Ex.: 3 for 3%): "))
monthly_investment = float(input("Monthly deposit: "))
month = 1
balance = deposit
while month <= 24:
balance = balance + (balance * (rate / 100)) + monthly_investment
print(f"Balance for month {month} is R${balance:5.2f}.")
month = month + 1
print(f"The gain obtained with interest was R${balance-deposit:8.2f}.")