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May 20th, 2019
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  1. import math
  2. import sys
  3.  
  4. #Functions for the operations
  5. def add(num1, num2):
  6.     return num1 + num2
  7.  
  8. def subtract(num1, num2):
  9.     return num1 - num2
  10.  
  11. def multiply(num1, num2):
  12.     return num1 * num2
  13.  
  14. def divide(num1, num2):
  15.     return num1 / num2
  16.  
  17. def expo(num1, num2):
  18.     return num1 ** num2
  19.  
  20. #The calculating function
  21. def calc():
  22.     print("Select an operator:")
  23.     print("1.Add")
  24.     print("2.Subtract")
  25.     print("3.Multiply")
  26.     print("4.Divide")
  27.     print("5.Expo")
  28.     print("6.Root")
  29.     select = int(input())
  30.     if select >=1 and select <=6:
  31.         if select == int(6):
  32.             print("Enter a number...")
  33.             root = int(float(input()))
  34.             print("√", root,"=", math.sqrt(root))
  35.         else:
  36.             print("Enter the first number...")
  37.             num1 = int(float(input()))
  38.             print("Enter the second number...")
  39.             num2 = int(float(input()))
  40.             if select == int(1):
  41.                 print(num1, "+",num2,"=", add(num1, num2))
  42.             elif select == int(2):
  43.                 print(num1, "-",num2,"=", subtract(num1, num2))
  44.             elif select == int(3):
  45.                 print(num1, "*",num2,"=",  multiply(num1, num2))
  46.             elif select == int(4):
  47.                 print(num1, "/",num2,"=", divide(num1, num2))
  48.             elif select == int(5):
  49.                 print(num1, "**",num2,"=", expo(num1, num2))
  50.     else:
  51.         print("Invalid input!")
  52.  
  53.  
  54. #The main function which use a while loop
  55. def main():
  56.     while True:
  57.         calc()
  58.         print('\nCalculation finished. Do another? (Y/N)')
  59.         selector = input()
  60.         if selector.lower() == 'n':
  61.             break
  62.  
  63.  
  64. #About the script, here I use the main function
  65. print("This is a simple calculator on python.")
  66. main()
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