main.py

#-*-coding:utf8;-*-
#qpy:3
#qpy:console
import math
print("""Calculator programmed my ahmed
    **
        **
            **
the Calculator can perform the following functions
1 four basic operations (add,multiply, subtract and divide)
2.Squares and Square root
3.mean
4.range
5.area and volume of basic shapes
6.factorials
7.trigonmetric operations (cos,sin and tan
8.logarithmic functions
9.modular arithmetic
10.One line maths(+ - / *)
10.many mor features to be added soon""")

def calculate ():
 print("Enter 'add' to add two numbers")
 print("Enter 'subtract' to subtract two numbers")
 print("enter 'oneline' to add subtract or divide more than two numbers")
 print("Enter 'multiply' to multiply two numbers")
 print("Enter 'divide' to divide two numbers")
 print("Enter 'others' For more functions")
 print("Enter 'mod' for modular arithmetic")
 print("Enter 'quit' to end the program")

 user_input = input(": ")

 if user_input == "add":
  num1 = float(input("Enter a number: "))
  num2 = float(input("Enter another number: "))
  result = str(num1 + num2)
  print(result)
 elif user_input == "subtract":
  num1 = float(input("Enter a number: "))
  num2 = float(input("Enter another number: "))
  result = str(num1 - num2)
  print(result)
 elif user_input == "oneline":
     def oneline():
         try:
          oneline_math = eval(input("enter math expression (e.g 1+1+1, 5*4*1) "))
          print(oneline_math)
          print("do you wish to repeat for yes enter 'y' for no enter 'n' ")
          def repeat():
            repl = input("y or n:" )
            if repl == "y":
             oneline()
            elif repl =="n" :
             calculate()
            else:
             print("try again")
             repeat()
          repeat()
         except SyntaxError:
          print("syntax error please try again")
          oneline()
         except ZeroDivisionError:
          print("don't divide by zero try again")
          oneline()
         except :
          print ("error try again")
          oneline()
     oneline()
 elif user_input == "multiply":
  def multiply():
   try:
    num1 = float(input("Enter a number: "))
    num2 = float(input("Enter another number: "))
    result = str(num1 * num2)
    print(result)
   except:
    print("error try again")
    multiply()
  def repeat():
            print("do you wish to repeat for yes enter 'y' for no enter 'n' ")
            repl = input("y or n:" )
            if repl == "y":
              multiply()
            elif repl =="n" :
             calculate()
            else:
             print("try again")
             repeat()
  multiply()
  repeat()
 elif user_input == "divide":
  num1 = float(input("Enter a number: "))
  num2 = float(input("Enter another number: "))
  result = str(num1 / num2)
  print(result)
 elif user_input == "mod":
  num1 = float(input("Enter a number: "))
  num2 = float(input("Enter another number: "))
  result = str(num1 % num2)
  print(result)
 elif user_input == "quit":
  exit()
 elif user_input == "others":
  def others():
   print("waiting")

   print ("""
for Sine  type sin
for Cosine of type cos
for Tangeant type: tan
for Square root type: sqrt
for square type sq
for log type log
for factorials type factorial
for mean or range type statistics
for area of a (rectangle/square, triangle, circle) type area
type back to go back
type q to quit
""")

   fcn = input(": ")
   print(fcn)
   if fcn == "sin":
      num=float(input("enter number: "))
      result = float(math.radians(num))
      print(str(math.sin(result)))
   elif fcn == "cos":
      num=float(input("enter number: "))
      result = float(math.radians(num))
      print(str(math.cos(result)))
   elif fcn == "tan":
      num=float(input("enter number: "))
      result = float(math.radians(num))
      print(str(math.tan(result)))
   elif fcn == "sqr":
      num=float(input("enter number: "))
      result = float(num) * float(num)
      another  ="square of " +  (str(num)) + " is " + (str(result))
      print(another)
   elif fcn == "back":
         calculate()
   elif fcn == "sqrt":
          num=float(input("enter number: "))
          result = float(math.sqrt(num))
          another  ="square root of " +  (str(num)) + " is " + (str(result))
          print(another)
   elif fcn == "q":
    print("bye bye")
    exit()
   elif fcn == "factorial":
       num=int(input("enter number: "))
       result = int(math.factorial(num))
       another = (str(num)) + "! " + "is " + (str(result))
       print(another)
   else:
    others()
  others()
 else:
  calculate()

def again():
 while 1==1:
  print("any other calculations ?? enter yes or no")
  answer = input(": ")
  if answer == "yes":
     calculate()
  elif answer == "no":
   print("bye bye")
   exit()
  else:
   again()

calculate()
again()