Banking ICSE Interest Calculator

Calculation of interest on a savings bank account

Mini Python project for middle and high school students

Example

Run the code on google colaboratory

Python Code:

class Solution(object):

    def Banking(self, numberOfMonths):

        transactions = dict()

        for i in range(numberOfMonths):

            month = str(input("Enter the month:"))

            transactions_for_month = int(

                input("Enter the number of transactions for this month:"))

            tempList = []

            for j in range(transactions_for_month):

                tempList.append(int(input("Enter the date of the month:")))

                # put a negative sign before the number if the amount is withdrawn

                tempList.append(

                    float(input("Enter the amount deposited or withdrawn:")))

            transactions[month] = tempList

        #print(transactions)

        self.MinimumBalance(transactions)

    def MinimumBalance(self, transactions):

        key = list(transactions.keys())

        balance = []

        balanceFinal = 0

        date = []

        monthWiseMBList = []

        for i in range(len(transactions)):

            for j in range(len(transactions[key[i]])):

                if j % 2 == 0:

                    date.append(transactions[key[i]][j])

                else:

                    balanceFinal += (transactions[key[i]][j])

                    balance.append(balanceFinal)

            balanceFinal = balance[-1]

            #print(balance)

            #print(date)

            if i != 0:

                move_date += int((len(transactions[key[i - 1]]) / 2))

            else:

                move_date = 0

            #print(move_date)

            minimumBalanceMonthly = float('inf')

            flagTransactionLessThanTenth = False

           

            for k in range(len(date) - move_date):

                if date[k+move_date] <= 10:

                    minimumBalanceMonthly = balance[k + move_date]

                    flagTransactionLessThanTenth = True

                else:

                    if minimumBalanceMonthly > balance[k + move_date]:

                        minimumBalanceMonthly = balance[k + move_date]

            if len(transactions[key[i]]) == 0:

                monthWiseMBList.append(monthWiseMBList[i - 1])

            else:

                monthWiseMBList.append(minimumBalanceMonthly)

            if flagTransactionLessThanTenth == False:

                if i == 0:

                    print(monthWiseMBList[i], i, minimumBalanceMonthly)

                    monthWiseMBList[i] = 0

                if i!=0:

                    if monthWiseMBList[i] > monthWiseMBList[i - 1] and len(transactions[key[i]]) != 0:

                        monthWiseMBList[i] = monthWiseMBList[i - 1]

                    else:

                        monthWiseMBList[i] = balance[-1]

            if i == len(key) - 1:

                print("Press Y/y is the account was closed in the month of ", key[-1])

                choice = str(input())

                if choice == "Y" or choice == "y":

                    monthWiseMBList[-1] = 0

            print("Minimum Monthly Balance for the month of ", key[i], "= ",

                  monthWiseMBList[i])

        #calculation of interest

        qualifyingAmount = 0

        for j in (monthWiseMBList):

            qualifyingAmount += j

        print("Total of balances ", qualifyingAmount)

        rate_of_interest = float(input("Enter the rate of interest:"))

        interest = (qualifyingAmount * rate_of_interest * (1 / 12)) / 100.0

        print("Total interest earned = ", round(interest, 2))

obj = Solution()

numberOfmonths = int(input("Enter the number of months:"))

obj.Banking(numberOfmonths)