making a calculator in python using functions code example

Example 1: simple python calculator

#Store number variables for the two numbers

num1 = input('Enter first number: ')
num2 = input('Enter second number: ')

#the sum of the two numbers variable
sum = float(num1) + float(num2)
sum2 = float(num1) - float(num2)
sum3 = float(num1) * float(num2)
sum4 = float(num1) / float(num2)

#what operator to use
choice = input('Enter an operator, + = addition, - = subtraction, * = multiplication and / = division: ')
#different sums based on the operators
if choice == '+':
  print('The sum of {0} and {1} is {2}'.format(num1, num2, sum))

  if choice == '-':
    print('The sum of {0} and {1} is {2}'.format(num1, num2, sum2))

if choice == '*':
    print('The sum of {0} and {1} is {2}'.format(num1, num2, sum3))

if choice == '/':
    print('The sum of {0} and {1} is {2}'.format(num1, num2, sum4))

Example 2: how to make a python calculator

#Calculator

import time

def add():
  n1 = input('Enter a number: ')
  n2 = input('Enter another number: ')
  time.sleep(1)
  print(int(n1)+int(n2))
  
def multiply():
  n1 = input('Enter a number: ')
  n2 = input('Enter another number: ')
  time.sleep(1)
  print(int(n1)*int(n2))
    
def divide():
  n1 = input('Enter a number: ')
  n2 = input('Enter another number: ')
  time.sleep(1)
  print(int(n1)int(n2))
  
def subtract():
  n1 = input('Enter a number: ')
  n2 = input('Enter another number: ')
  time.sleep(1)
  print(int(n1)-int(n2))
  
run = True
while run:
  ans = input('Select an opreation: ')
  if(ans=='Addition'):
    add()
    
  if(ans=='Divide'):
    divide()
    
  if(ans=='Multiply'):
    multiply()
    
  if(ans=='Subtract'):
    subtract()