Example 1: how to make a calculator using idle
def calculate():
operation = input('''
Please type in the math operation you would like to complete:
+ for addition
- for subtraction
* for multiplication
/ for division
''')
number_1 = int(input('Please enter the first number: '))
number_2 = int(input('Please enter the second number: '))
if operation == '+':
print('{} + {} = '.format(number_1, number_2))
print(number_1 + number_2)
elif operation == '-':
print('{} - {} = '.format(number_1, number_2))
print(number_1 - number_2)
elif operation == '*':
print('{} * {} = '.format(number_1, number_2))
print(number_1 * number_2)
elif operation == '/':
print('{} / {} = '.format(number_1, number_2))
print(number_1 / number_2)
else:
print('You have not typed a valid operator, please run the program again.')
again()
def again():
calc_again = input('''
Do you want to calculate again?
Please type Y for YES or N for NO.
''')
if calc_again.upper() == 'Y':
calculate()
elif calc_again.upper() == 'N':
print('See you later.')
else:
again()
calculate()
Example 2: python code to make a calculator frame
from tkinter import *
expression = ""
def input_number(number, equation):
global expression
expression = expression + str(number)
equation.set(expression)
def clear_input_field(equation):
global expression
expression = ""
equation.set("Enter the expression")
def evaluate(equation):
global expression
try:
result = str(eval(expression))
equation.set(result)
expression = ""
except:
expression = ""
def main():
window.title("Calculator")
window.geometry("325x175")
equation = StringVar()
input_field = Entry(window, textvariable=equation)
input_field.place(height=100)
input_field.grid(columnspan=4, ipadx=100, ipady=5)
equation.set("Enter the expression")
_1 = Button(window, text='1', fg='white', bg='black', bd=0, command=lambda: input_number(1, equation), height=2, width=7)
_1.grid(row=2, column=0)
_2 = Button(window, text='2', fg='white', bg='black', bd=0, command=lambda: input_number(2, equation), height=2, width=7)
_2.grid(row=2, column=1)
_3 = Button(window, text='3', fg='white', bg='black', bd=0, command=lambda: input_number(3, equation), height=2, width=7)
_3.grid(row=2, column=2)
_4 = Button(window, text='4', fg='white', bg='black', bd=0, command=lambda: input_number(4, equation), height=2, width=7)
_4.grid(row=3, column=0)
_5 = Button(window, text='5', fg='white', bg='black', bd=0, command=lambda: input_number(5, equation), height=2, width=7)
_5.grid(row=3, column=1)
_6 = Button(window, text='6', fg='white', bg='black', bd=0, command=lambda: input_number(6, equation), height=2, width=7)
_6.grid(row=3, column=2)
_7 = Button(window, text='7', fg='white', bg='black', bd=0, command=lambda: input_number(7, equation), height=2, width=7)
_7.grid(row=4, column=0)
_8 = Button(window, text='8', fg='white', bg='black', bd=0, command=lambda: input_number(8, equation), height=2, width=7)
_8.grid(row=4, column=1)
_9 = Button(window, text='9', fg='white', bg='black', bd=0, command=lambda: input_number(9, equation), height=2, width=7)
_9.grid(row=4, column=2)
_0 = Button(window, text='0', fg='white', bg='black', bd=0, command=lambda: input_number(0, equation), height=2, width=7)
_0.grid(row=5, column=0)
plus = Button(window, text='+', fg='white', bg='black', bd=0, command=lambda: input_number('+', equation), height=2, width=7)
plus.grid(row=2, column=3)
minus = Button(window, text='-', fg='white', bg='black', bd=0, command=lambda: input_number('-', equation), height=2, width=7)
minus.grid(row=3, column=3)
multiply = Button(window, text='*', fg='white', bg='black', bd=0, command=lambda: input_number('*', equation), height=2, width=7)
multiply.grid(row=4, column=3)
divide = Button(window, text='/', fg='white', bg='black', bd=0, command=lambda: input_number('/', equation), height=2, width=7)
divide.grid(row=5, column=3)
equal = Button(window, text='=', fg='white', bg='black', bd=0, command=lambda: evaluate(equation), height=2, width=7)
equal.grid(row=5, column=2)
clear = Button(window, text='Clear', fg='white', bg='black', bd=0, command=lambda: clear_input_field(equation), height=2, width=7)
clear.grid(row=5, column=1)
window.mainloop()
if __name__ == '__main__':
main()