diff --git a/main.py b/main.py
index a7da066..9b4df86 100644
--- a/main.py
+++ b/main.py
@@ -143,3 +143,422 @@ def wxpython_app():
 
 if __name__ == "__main__":
     main()
+    
+    
+    
+    
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+
+Python | Simple GUI calculator using Tkinter
+
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+k.
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+
+# Python program to create a simple GUI 
+
+# calculator using Tkinter 
+
+ 
+
+# import everything from tkinter module 
+
+from tkinter import *
+
+ 
+
+# globally declare the expression variable 
+
+expression = "" 
+
+ 
+
+ 
+
+# Function to update expression 
+
+# in the text entry box 
+
+def press(num): 
+
+    # point out the global expression variable 
+
+    global expression 
+
+ 
+
+    # concatenation of string 
+
+    expression = expression + str(num) 
+
+ 
+
+    # update the expression by using set method 
+
+    equation.set(expression) 
+
+ 
+
+ 
+
+# Function to evaluate the final expression 
+
+def equalpress(): 
+
+    # Try and except statement is used 
+
+    # for handling the errors like zero 
+
+    # division error etc. 
+
+ 
+
+    # Put that code inside the try block 
+
+    # which may generate the error 
+
+    try: 
+
+ 
+
+        global expression 
+
+ 
+
+        # eval function evaluate the expression 
+
+        # and str function convert the result 
+
+        # into string 
+
+        total = str(eval(expression)) 
+
+ 
+
+        equation.set(total) 
+
+ 
+
+        # initialize the expression variable 
+
+        # by empty string 
+
+        expression = "" 
+
+ 
+
+    # if error is generate then handle 
+
+    # by the except block 
+
+    except: 
+
+ 
+
+        equation.set(" error ") 
+
+        expression = "" 
+
+ 
+
+ 
+
+# Function to clear the contents 
+
+# of text entry box 
+
+def clear(): 
+
+    global expression 
+
+    expression = "" 
+
+    equation.set("") 
+
+ 
+
+ 
+
+# Driver code 
+
+if __name__ == "__main__": 
+
+    # create a GUI window 
+
+    gui = Tk() 
+
+ 
+
+    # set the background colour of GUI window 
+
+    gui.configure(background="light green") 
+
+ 
+
+    # set the title of GUI window 
+
+    gui.title("Simple Calculator") 
+
+ 
+
+    # set the configuration of GUI window 
+
+    gui.geometry("270x150") 
+
+ 
+
+    # StringVar() is the variable class 
+
+    # we create an instance of this class 
+
+    equation = StringVar() 
+
+ 
+
+    # create the text entry box for 
+
+    # showing the expression . 
+
+    expression_field = Entry(gui, textvariable=equation) 
+
+ 
+
+    # grid method is used for placing 
+
+    # the widgets at respective positions 
+
+    # in table like structure . 
+
+    expression_field.grid(columnspan=4, ipadx=70)
+
+ 
+
+    # create a Buttons and place at a particular 
+
+    # location inside the root window . 
+
+    # when user press the button, the command or 
+
+    # function affiliated to that button is executed . 
+
+    button1 = Button(gui, text=' 1 ', fg='black', bg='red', 
+
+                    command=lambda: press(1), height=1, width=7) 
+
+    button1.grid(row=2, column=0) 
+
+ 
+
+    button2 = Button(gui, text=' 2 ', fg='black', bg='red', 
+
+                    command=lambda: press(2), height=1, width=7) 
+
+    button2.grid(row=2, column=1) 
+
+ 
+
+    button3 = Button(gui, text=' 3 ', fg='black', bg='red', 
+
+                    command=lambda: press(3), height=1, width=7) 
+
+    button3.grid(row=2, column=2) 
+
+ 
+
+    button4 = Button(gui, text=' 4 ', fg='black', bg='red', 
+
+                    command=lambda: press(4), height=1, width=7) 
+
+    button4.grid(row=3, column=0) 
+
+ 
+
+    button5 = Button(gui, text=' 5 ', fg='black', bg='red', 
+
+                    command=lambda: press(5), height=1, width=7) 
+
+    button5.grid(row=3, column=1) 
+
+ 
+
+    button6 = Button(gui, text=' 6 ', fg='black', bg='red', 
+
+                    command=lambda: press(6), height=1, width=7) 
+
+    button6.grid(row=3, column=2) 
+
+ 
+
+    button7 = Button(gui, text=' 7 ', fg='black', bg='red', 
+
+                    command=lambda: press(7), height=1, width=7) 
+
+    button7.grid(row=4, column=0) 
+
+ 
+
+    button8 = Button(gui, text=' 8 ', fg='black', bg='red', 
+
+                    command=lambda: press(8), height=1, width=7) 
+
+    button8.grid(row=4, column=1) 
+
+ 
+
+    button9 = Button(gui, text=' 9 ', fg='black', bg='red', 
+
+                    command=lambda: press(9), height=1, width=7) 
+
+    button9.grid(row=4, column=2) 
+
+ 
+
+    button0 = Button(gui, text=' 0 ', fg='black', bg='red', 
+
+                    command=lambda: press(0), height=1, width=7) 
+
+    button0.grid(row=5, column=0) 
+
+ 
+
+    plus = Button(gui, text=' + ', fg='black', bg='red', 
+
+                command=lambda: press("+"), height=1, width=7) 
+
+    plus.grid(row=2, column=3) 
+
+ 
+
+    minus = Button(gui, text=' - ', fg='black', bg='red', 
+
+                command=lambda: press("-"), height=1, width=7) 
+
+    minus.grid(row=3, column=3) 
+
+ 
+
+    multiply = Button(gui, text=' * ', fg='black', bg='red', 
+
+                    command=lambda: press("*"), height=1, width=7) 
+
+    multiply.grid(row=4, column=3) 
+
+ 
+
+    divide = Button(gui, text=' / ', fg='black', bg='red', 
+
+                    command=lambda: press("/"), height=1, width=7) 
+
+    divide.grid(row=5, column=3) 
+
+ 
+
+    equal = Button(gui, text=' = ', fg='black', bg='red', 
+
+                command=equalpress, height=1, width=7) 
+
+    equal.grid(row=5, column=2) 
+
+ 
+
+    clear = Button(gui, text='Clear', fg='black', bg='red', 
+
+                command=clear, height=1, width=7) 
+
+    clear.grid(row=5, column='1') 
+
+ 
+
+    Decimal= Button(gui, text='.', fg='black', bg='red', 
+
+                    command=lambda: press('.'), height=1, width=7) 
+
+    Decimal.grid(row=6, column=0) 
+
+    # start the GUI 
+
+    gui.mainloop() 
+
+Output : 
+
+ Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.  
+
+To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course. And to begin with your Machine Learning Journey, join the Machine Learning – Basic Level Course
+
+Article Tags : ProjectPython Python-tkinter
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