Merge pull request #715 from neelshah2409/main

Loan Calculator

Author: prathimacode-hub

GUIScripts/Loan Calculator/Images/output_1(loan).png

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+# Loan Calculator
+
+## Aim
+
+To make a Loan calculator
+
+## Purpose
+
+For calculating the monthly repay and annual repay of loan amount in an easier manner.
+
+## Short description of package/script
+ - Here using the tkinter we had made an gui script where we ask the user their rate of interest and the amount of loan and duration and from that we give their repay amount, so it will be easier for a bank employeer and customer both to get a loan at the cheapest rate.
+- List out the libraries imported- >tkinter
+
+
+## Workflow of the Project
+
+After running the script the gui application will pop and asks the user about rate of interest and the amount of loan and duration and will give repay amount as output.
+
+
+## Setup instructions
+
+Firstly install tkinter library and then run the script so the gui application will pop and asks the user about rate of interest and the amount of loan and duration and will give repay amount as output.
+
+
+
+## Output
+
+![image](Images/output_1(loan).png)
+![image](Images/output_2(loan).png)
+
+
+## Author(s)
+
+Neel Shah

GUIScripts/Loan Calculator/Images/output_2(loan).png

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+# Import TKinter Module
+from tkinter import * # (*) Imports whole module
+
+# Create a user defined class named: LoanCalculator which holds it's own
+# data members and member functions.
+
+class LoanCalculator:
+def __init__(self): #Special method in Python Class-Constructor of a Python Class
+window = Tk() #Creates a window to house the calculator bits
+window.title("Loan Calculator") # sets the title
+window.configure(background = "light green") # sets bg color for window
+
+# Create input boxes: Label function creates a display box to take input
+# The grid method gives it a table like structure
+#Widgets are centered by default.
+Label(window, font='Helvetica 12 bold',bg ="light green",text="Annual Interest Rate").grid(row=1,column=1, sticky=W)
+Label(window, font='Helvetica 12 bold',bg ="light green",text="Number of Years").grid(row=2,column=1, sticky=W)
+Label(window, font='Helvetica 12 bold',bg ="light green",text="Loan Amount").grid(row=3,column=1, sticky=W)
+Label(window, font='Helvetica 12 bold',bg ="light green", text="Monthly Payment").grid(row=4,column=1, sticky=W)
+Label(window, font='Helvetica 12 bold',bg ="light green",text="Total Payment").grid(row=5,column=1, sticky=W)
+
+# Create objects: first 3 objects to take inputs using entry() function
+
+self.annualInterestRateVar = StringVar()
+Entry(window, textvariable=self.annualInterestRateVar,justify=RIGHT).grid(row=1, column=2)
+
+self.numberofYearsVar = StringVar()
+Entry(window, textvariable=self.numberofYearsVar,justify=RIGHT).grid(row=2, column=2)
+
+self.loanAmountVar = StringVar()
+Entry(window, textvariable=self.loanAmountVar,justify=RIGHT).grid(row=3, column=2)
+
+self.monthlyPaymentVar = StringVar()
+lblMonthlyPayment= Label(window,font='Helvetica 12 bold',bg ="light green", textvariable=self.monthlyPaymentVar).grid(row=4,column=2, sticky=E)
+
+self.totalPaymentVar = StringVar()
+lblTotalPayment= Label(window,font='Helvetica 12 bold',bg ="light green", textvariable=self.totalPaymentVar).grid(row=5,column=2, sticky=E)
+
+# Create button to calculate payment. When button is clicked it will call the compute payment function
+
+btComputePayment = Button(window, text="Compute Payment",bg="red",fg="white",font='Helvetica 14 bold', command=self.computePayment).grid(row=6, column=2, sticky=E)
+btClear = Button(window, text="Clear",bg="blue",fg="white",font='Helvetica 14 bold', command=self.delete_all).grid(row=6, column=8, padx=20,pady=20 ,sticky=E)
+
+window.mainloop() # The mainloop () function is used to run the application program.
+
+# Create function to compute total payment
+
+def computePayment(self):
+monthlyPayment = self.getMonthlyPayment(
+float(self.loanAmountVar.get()),
+float(self.annualInterestRateVar.get()) / 1200 ,
+int(self.numberofYearsVar.get()))
+
+
+self.monthlyPaymentVar.set(format(monthlyPayment, '10.2f'))
+totalPayment = float(self.monthlyPaymentVar.get()) * 12 \
+ * int(self.numberofYearsVar.get())
+
+self.totalPaymentVar.set(format(totalPayment, '10.2f'))
+
+
+def getMonthlyPayment(self,loanAmount,monthlyInterestRate,numberofYears):
+monthlyPayment = loanAmount * monthlyInterestRate / (1-1/(1 + monthlyInterestRate)** (numberofYears * 12 ))
+return monthlyPayment
+
+
+def delete_all(self) :
+self.monthlyPaymentVar.set("")
+self.loanAmountVar.set("")
+self.annualInterestRateVar.set("")
+self.numberofYearsVar.set("")
+self.totalPaymentVar.set("")
+
+
+
+
+# Call the class to run the program
+
+LoanCalculator()

GUIScripts/Loan Calculator/README.md

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+Libraries used: tkinter