how to make a calculator in python

1#Store number variables for the two numbers
2
3num1 = input('Enter first number: ')
4num2 = input('Enter second number: ')
5
6#the sum of the two numbers variable
7sum = float(num1) + float(num2)
8sum2 = float(num1) - float(num2)
9sum3 = float(num1) * float(num2)
10sum4 = float(num1) / float(num2)
11
12#what operator to use
13choice = input('Enter an operator, + = addition, - = subtraction, * = multiplication and / = division: ')
14#different sums based on the operators
15if choice == '+':
16  print('The sum of {0} and {1} is {2}'.format(num1, num2, sum))
17
18  if choice == '-':
19    print('The sum of {0} and {1} is {2}'.format(num1, num2, sum2))
20
21if choice == '*':
22    print('The sum of {0} and {1} is {2}'.format(num1, num2, sum3))
23
24if choice == '/':
25    print('The sum of {0} and {1} is {2}'.format(num1, num2, sum4))
26 

1from tkinter import *
2import random
3import time
4
5def btnClick(numbers):
6	global operator
7	operator = operator + str(numbers)
8	text_Input.set(operator)
9
10def bcd():
11	global operator
12	operator = ""
13	text_Input.set("")
14
15def bei():
16	global operator
17	sumup = str(eval(operator))
18	text_Input.set(sumup)
19	operator = sumup
20
21
22root = Tk()
23root.title("Calculator")
24root.resizable(False, False)
25
26operator = ""
27text_Input = StringVar()
28
29#AnsShow
30textDisplay = Entry(root, font = ('arial', 20, 'bold'), textvariable = text_Input, bd = 30, insertwidth = 4, bg = "red", justify = 'right')
31textDisplay.grid(columnspan = 4)
32
33#button
34btn7 = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "7", command = lambda:btnClick(7)).grid(row = 1, column = 0)
35
36btn8 = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "8", command = lambda:btnClick(8)).grid(row = 1, column = 1)
37
38btn9 = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "9", command = lambda:btnClick(9)).grid(row = 1, column = 2)
39
40Add = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "+", command = lambda:btnClick("+")).grid(row = 1, column = 3)
41
42#============================================================================================================================#
43btn4 = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "4", command = lambda:btnClick(4)).grid(row = 2, column = 0)
44
45btn5 = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "5", command = lambda:btnClick(5)).grid(row = 2, column = 1)
46
47btn6 = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "6", command = lambda:btnClick(6)).grid(row = 2, column = 2)
48
49Sub = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "-", command = lambda:btnClick("-")).grid(row = 2, column = 3)
50
51#===============================================================================================================================#
52btn1 = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "1", command = lambda:btnClick(1)).grid(row = 3, column = 0)
53
54btn2 = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "2", command = lambda:btnClick(2)).grid(row = 3, column = 1)
55
56btn3 = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "3", command = lambda:btnClick(3)).grid(row = 3, column = 2)
57
58Multiply = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "*", command = lambda:btnClick("*")).grid(row = 3, column = 3)
59
60#==================================================================================================================================#
61btn0 = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "0", command = lambda:btnClick(0)).grid(row = 4, column = 0)
62
63equal = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "=", command = bei).grid(row = 4, column = 1)
64
65divide = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "/", command = lambda:btnClick("/")).grid(row = 4, column = 2)
66
67clear = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "c", command = bcd).grid(row = 4, column = 3)
68
69root.mainloop()

1import math 
2def SquareRoot (x):
3   return math.sqrt(x)
4  
5
6def lcm(x, y):  
7   
8    if x > y:  
9        greater = x  
10    else:  
11        greater = y  
12    while(True):  
13        if((greater % x == 0) and (greater % y == 0)):  
14            lcm = greater  
15            break  
16        greater += 1  
17    return lcm  
18
19def hcf(a,b):
20    H=a if a<b else b
21    while H>=1:
22        if a%H==0 and b%H==0:
23            return H
24        H-=1
25     
26
27def add(x, y):
28    return x + y
29
30
31def subtract(x, y):
32    return x - y
33
34
35def multiply(x, y):
36    return x * y
37
38
39def divide(x, y):
40    return x / y
41
42
43print("Select operation.")
44print("1.Add")
45print("2.Subtract")
46print("3.Multiply")
47print("4.Divide")
48print("5.lcm")
49print("6.SquareRoot")
50print("7.hcf")
51
52
53while True:
54    
55    choice = input("Enter choice(1/2/3/4/5/6/7): ")
56
57    
58    if choice in ('1', '2', '3', '4','5','7'):
59        num1 = float(input("Enter first number: "))
60        num2 = float(input("Enter second number: "))
61
62        if choice == '1':
63            print(num1, "+", num2, "=", add(num1, num2))
64
65        elif choice == '2':
66            print(num1, "-", num2, "=", subtract(num1, num2))
67
68        elif choice == '3':
69            print(num1, "*", num2, "=", multiply(num1, num2))
70
71        elif choice == '4':
72            print(num1, "/", num2, "=", divide(num1, num2))
73        
74        elif choice == '5':
75          print("The L.C.M. of", num1,"and", num2,"is", lcm(num1, num2)) 
76
77        elif choice == '7':
78          print("The H.C.F of", num1,"and", num2,"is", hcf(num1, num2)) 
79
80        
81        next_calculation = input("Do you want to do another calculation (yes/no): " )
82        if next_calculation == "no":
83          break
84
85    elif choice in ('6'):
86        num0 = float(input("Enter a number: "))
87        
88        if choice == '6':
89            print("The SquareRoot of ",num0,"is",SquareRoot(num0))
90
91    else:
92        print("Invalid Input")

1#Calculator
2
3import time
4
5def add():
6  n1 = input('Enter a number: ')
7  n2 = input('Enter another number: ')
8  time.sleep(1)
9  print(int(n1)+int(n2))
10  
11def multiply():
12  n1 = input('Enter a number: ')
13  n2 = input('Enter another number: ')
14  time.sleep(1)
15  print(int(n1)*int(n2))
16    
17def divide():
18  n1 = input('Enter a number: ')
19  n2 = input('Enter another number: ')
20  time.sleep(1)
21  print(int(n1)int(n2))
22  
23def subtract():
24  n1 = input('Enter a number: ')
25  n2 = input('Enter another number: ')
26  time.sleep(1)
27  print(int(n1)-int(n2))
28  
29run = True
30while run:
31  ans = input('Select an opreation: ')
32  if(ans=='Addition'):
33    add()
34    
35  if(ans=='Divide'):
36    divide()
37    
38  if(ans=='Multiply'):
39    multiply()
40    
41  if(ans=='Subtract'):
42    subtract()
43  
44  
45  

1# This will be one of the most advanced results you will find.
2
3# We will be using classes and simple operators like +,-,*,/
4
5class Calculator:
6  def addition(a,b):
7    return a + b
8
9  def subtraction(a,b):
10    if a<b:
11      return b - a
12    else:
13      return a - b
14
15  def multiplication(a,b):
16    return a * b
17
18  def division(a,b):	
19    if a<b:
20      return b / a
21    else:
22      return a / b
23
24# You can do this in terminal.
25<C:/Users/username>python
26>>> from main import Calculator
27>>> result = Calculator.[addition|subtraction|multiplication|division](anyNumber, anyNumber)
28>>> print(result)

1#You can change Text at Inputs
2
3num1 = float(input("Enter Firt Number:"))
4num2 = float(input("Enter Second Number"))
5
6result= 0
7op = str(input("Enter an op(operator)"))
8#Gets Input Type--------
9try:
10  #U can make this in while loop ;-)
11  if op=="+":
12    result = num1 + num2
13  else if op=="-":
14    result = num1 - num2
15  else if op=="*":
16    result = num1 * num2
17  else if op=="/":
18    result = num1 / num2
19  else:
20      print("Invalid Input")
21  print("The result is " + result)
22except ZeroDivisionError:
23  print("U cant do that")
24