how to make a python calculator

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 

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  

1def calculate():
2    operation = input('''
3Please type in the math operation you would like to complete:
4+ for addition
5- for subtraction
6* for multiplication
7/ for division
8''')
9
10    number_1 = int(input('Please enter the first number: '))
11    number_2 = int(input('Please enter the second number: '))
12
13    if operation == '+':
14        print('{} + {} = '.format(number_1, number_2))
15        print(number_1 + number_2)
16
17    elif operation == '-':
18        print('{} - {} = '.format(number_1, number_2))
19        print(number_1 - number_2)
20
21    elif operation == '*':
22        print('{} * {} = '.format(number_1, number_2))
23        print(number_1 * number_2)
24
25    elif operation == '/':
26        print('{} / {} = '.format(number_1, number_2))
27        print(number_1 / number_2)
28
29    else:
30        print('You have not typed a valid operator, please run the program again.')
31
32    # Add again() function to calculate() function
33    again()
34
35def again():
36    calc_again = input('''
37Do you want to calculate again?
38Please type Y for YES or N for NO.
39''')
40
41    if calc_again.upper() == 'Y':
42        calculate()
43    elif calc_again.upper() == 'N':
44        print('See you later.')
45    else:
46        again()
47
48calculate()

1num_one = int(input("Enter 1st number: "))
2
3op = input("Enter operator: ")
4
5num_two = int(input("Enter 2nd number: "))
6
7if op == "+":
8    print(num_one + num_two)
9elif op == "-":
10    print(num_one - num_two)
11elif op == "*" or op == "x":
12    print(num_one * num_two)
13elif op == "/":
14    print(num_one / num_two)
15

1def mutiply (x):
2    return 5*x
3o = mutiply(10)
4print(o)

1#Simple python Calculator
2#Enter the first variable
3#then the operator
4#and finally the second variable, then the answer is printed.
5A = int(input("Enter your first number: "))
6operator = input("Which operation would you like to perform? (+, -, /, *, //, **): ");
7B = int(input("Enter your second number: "))
8#Addition
9if operator == "+":
10    ans = A + B
11    print(str(ans))
12#Subraction
13elif operator == "-":
14    ans = A - B
15    print(str(ans))
16#division
17elif operator == "/":
18    ans = A / B
19    print(str(ans))
20#Multiplication
21elif operator == "*":
22    ans = A * B
23    print(str(ans))
24#Integer division
25elif operator == "//":
26    ans = A // B
27    print(str(ans))
28#Exponent
29elif operator == "**":
30    ans = A ** B
31    print(str(ans))
32else:
33    print("wrong operator!")
34