Question

Create a basic integer calculator program that uses two entries, a combo box, two labels, and a button to do basic calculations, as shown in the images below. The combo box should have the options for addition, subtraction, and multiplication, displayed as', andrespectively. Row 0 of the layout grid must contain an entry, the combo box and another entry in columns 0 through 2 respectively. There must also be a label somewhere displaying the result value, optionally preceded by an equals sign as shown in the images below. The button must contain the text'Calculate'. You may assume only integers are entered into the entries -79 123 -202 Calculate 231 250

Using Python GUI

from tkinter import *
from tkinter.ttk import *

def main():
window = Tk()
  
window.mainloop()

main()

Answer 1

Solution: Code: #Import necessary packages from tkinter import* from tkinter.ttk import * #Function for left side value def func_left): #Global variable declarations global value left, value right, lbl result, cmbo value #call the method value_left.get() unction for right side value def func_right (): #Global variable declarations global value left,value right, lbl result, cmbo value #call the method value_right.get() " ""Function for calculation""" def calculation cmbo () #Global variable declarations global value left, value right, lbl result, cmbo value Calculations if ㎝bo-value.get()-'' + ". lbl_resultl'text'-str (int (value_left.get)) + int (value_right.get ))) elif ㎝bo value.get() Ibl-result( 'text'] str (int (value-left.get()) - int (value-right .get())) elif cmbo-value . get()-'' * " : Ibl-result(' text '] = str (int (value-left .get()) * İnt(value-right.get())) #Main method def main): #Global variable declarations global value left, value right, lbl result, cmbo value #call the GUI window = Tk ( ) #values on array integer_ options[" "-", "*"] combo values cmbo valueCombobox (window, values-integer options)

cmbo value.set("+") #set the values ㎝bo-value . grid (row=0, column-1) value-left = Entry (window) value-left . grid (row=0, column=0) value_right - Entry (window) value right.grid (row=0, column-2) calc button= Button (window, text= ' Calculate', calc-button . grid (row=1, column=1) equals-label Label (window, text="-") equals_label.grid (row-0, column-3) Ibl result = Label (window) lbl result.grid (row-0, column- 4) #Call the main loop window.mainloop () command-calculation crbo) """Call main method""" main () Output #1: tk 10 Calculate Output #2: tk =-59 Calculate Output #3: tk 690 Calculate

Copyable Code:

#Import necessary packages
from tkinter import *
from tkinter.ttk import *

#Function for left side value
def func_left():
#Global variable declarations
global value_left, value_right, lbl_result, cmbo_value
#Call the method
value_left.get()

#Function for right side value
def func_right():
#Global variable declarations
global value_left, value_right, lbl_result, cmbo_value
#Call the method
value_right.get()

"""Function for calculation"""
def calculation_cmbo():
#Global variable declarations
global value_left, value_right, lbl_result, cmbo_value

#Calculations
if cmbo_value.get() == "+":
lbl_result['text'] = str(int(value_left.get()) + int(value_right.get()))
elif cmbo_value.get() == "-":
lbl_result['text'] = str(int(value_left.get()) - int(value_right.get()))
elif cmbo_value.get() == "*":
lbl_result['text'] = str(int(value_left.get()) * int(value_right.get()))

#Main method
def main():
#Global variable declarations
global value_left, value_right, lbl_result, cmbo_value
#Call the GUI
window = Tk()
#Values on array
integer_options = ["+", "-", "*"]

#Combo values
cmbo_value = Combobox(window,
values=integer_options)
cmbo_value.set("+")
#Set the values
cmbo_value.grid(row=0, column=1)
value_left = Entry(window)
value_left.grid(row=0, column=0)
value_right = Entry(window)
value_right.grid(row=0, column=2)
calc_button = Button(window, text='Calculate', command=calculation_cmbo)
calc_button.grid(row=1, column=1)
equals_label = Label(window, text="=")
equals_label.grid(row=0,column=3)
lbl_result = Label(window)
lbl_result.grid(row=0, column= 4)
#Call the main loop
window.mainloop()

"""Call main method"""
main()