[Daily Challenge #2 - Easy] - Calculator App - r/DailyProgrammer

Challenge_2_easy.py

# ***** DAILY CHALLENGE #2 - Easy *****

# Hello, coders! An important part of programming is being able to apply your programs, so your challenge for today is
# to create a calculator application that has use in your life. It might be an interest calculator, or it might be
# something that you can use in the classroom.
#
# For example, if you were in physics class, you might want to make a F = M * A calc.
#
# EXTRA CREDIT: make the calculator have multiple functions! Not only should it be able to calculate
# F = M * A, but also A = F/M, and M = F/A!

# ---------------------------------------------------------------------------------------------------------------------


def monthly_interest_calc(money, months, interest_rate):
    """Calculates simple monthly interest via x money, y months, and z interest in %.

    Args:
        money (float): Base amount of money to calculate.
        months (int): Time in months to calculate interest accumulated.
        interest_rate (float): Interest rate per month in percentage.

    Return:
        float: money + calculated interest

    """
    interest = interest_rate / 100
    interest_calc = interest * money * months
    result = money + interest_calc
    return round(result, 2)


def main():
    try:
        amount = float(input("Amount of Money: "))
        time = int(input("Number of Months: "))
        rate = float(input("Interest Rate in Percent: "))
        calc = monthly_interest_calc(amount, time, rate)
        print("\n$%.2f in %s Months at %.2f percent interest per month:\nTotal: $%.2f" % (amount, time, rate, calc))
    except ValueError:
        print("ERROR: input not valid. Try again.")
        main()

if __name__ == "__main__":
    main()

[Daily Challenge #2 - Easy] from the DailyProgrammer subreddit. Monthly Interest Calculator. No bonus.

Reference: https://www.reddit.com/r/dailyprogrammer/comments/pjbj8/easy_challenge_2/