def calculate():
print('What would you like to do?')
print('1. add')
print('2. subtract')
print('3. multiply')
print('4. divide')
print()
try:
operation = int(input(''))
except ValueError:
operation = int(input('That is not valid input. Please enter 1, 2, 3 or 4: '))
finally:
while(operation != 1 and operation != 2 and operation != 3 and operation != 4): #the function would not work properly with the
operation = int(input('That is not valid input. Please enter 1, 2, 3 or 4: ')) #while loop nested in an except statement
if(operation == 1):
print('You chose to add.')
result = addition.add()
elif(operation == 2):
print('You chose to subtract.')
result = subtraction.subtract()
elif(operation == 3):
print('You chose to multiply.')
result = multiplication.multiply()
elif(operation == 4):
print('You chose to divide.')
result = division.divide()
print()
print('The result is ' + str(result))
import subtraction
import multiplication
import division
print("Please make a choice. Select from:")
print("1 for add")
print("2 for subtract")
print("3 for multiply")
print("4 for divide")
if True:
choice = input("Enter selection(1, 2, 3, 4):")
if choice in ('1', '2', '3','4'):
num1 = float(input("Enter first number:"))
num2 = float(input("Enter second number:"))
if choice == '1':
print(num1, "+", num2, "=", addition.add(num1,num2))
elif choice == '2':
print(num1, "-", num2, "=", subtraction.subtract(num1, num2))
elif choice == '3':
print(num1, "*", num2, "=", multiplication.multiply(num1, num2))
elif choice == '4':
try:
print(num1, "/", num2, "=", division.divide(num1,num2))
except ZeroDivisionError:
print("You cannot divide by zero")
else:
print("Invalid Input")
def test_subtraction():
assert subtract(1, 1) == 1
def main_loop():
print("Welcome to the simple calculator. Please select from the following options:")
print()
print("1. Addition")
print("2. Subtraction")
print("3. Multiplication")
print("4. Division")
print()
user_selection = 0
while True:
try:
user_selection = int(input("Please enter your selection: "))
print()
if (user_selection < 1 or user_selection > 4):
raise CalculatorInputError("**Please enter a valid option**\n")
else:
break
except CalculatorInputError as err:
print(err)
continue
except ValueError:
print("\n**Please enter an integer**\n")
continue
while True:
try:
n1 = int(input("Please enter your first number: "))
print()
break
except ValueError: # No custom error is necessary here
print("\n**Please enter a valid number**\n")
continue
while True:
try:
n2 = int(input("Please enter your second number: "))
print()
break
except ValueError: # No custom error is necessary here
print("\n**Please enter a valid number**\n")
continue
if user_selection == 1:
addition.add(n1, n2)
elif user_selection == 2:
subtraction.subtract(n1, n2)
elif user_selection == 3:
multiplication.multiply(n1, n2)
elif user_selection == 4:
division.divide(n1, n2)
print()
while True:
try:
response = input("Would you like to perform a new operation (y/n): ")
if (response != "y" and response != "n"):
raise CalculatorInputError("\n**Please enter a valid option**\n")
else:
if (response == "y"):
print("\n**\n")
main_loop()
else:
quit()
except CalculatorInputError as err:
print(err)
continue
choice = True
iteration = 0
while (choice == True):
a = input("enter your number: ")
while (1):
try:
a = float(a)
break
except:
print("only numbers allowed")
a = input("enter your number: ")
if (option == '1'):
result = add(a, result)
if (option == '2' and iteration == 0):
result = subtract(a, result)
elif (option == '2'):
result = subtract(result, a)
if (option == '3'):
result = multiply(a, result)
if (option == '4' and iteration == 0):
result = divide(a, result)
elif (option == '4'):
result = divide(result, a)
iteration = iteration + 1
choice = input(
"do you want to add one more number to youe operation y/n : ") == "y"
print("your result", result)
import addition
import subtraction
import multiplication
import divide
print("Please choose an operation")
print("1: Addition")
print("2: Subtraction")
print("3: Multiplication")
print("4: Division")
try:
userChoice = int(input ("Enter Choice 1 or 2 or 3 or 4 : "))
except:
print ('You have entered an invalid option.')
else:
if userChoice in ('1', '2', '3', '4' ):
number1 = int(input("Enter first number: "))
number2 = int(input ("Enter second number: "))
if (userChoice == '1'):
print( "Result is: " str(addition.add(number1, number2)))
elif (userChoice == '2'):
print("Result is: " str(subtraction.subtract(number1, number2)))
elif (userChoice == '3'):
print ("Result is: " str(multiplication.multiply(number1, number2)))
elif (userChoice == '4'):
print("Result is: " str(divide.division(number1,number2)))
else:
print("Invalid user input")
def choose():
while True:
print("Welcome to my python calculator. What would you like to do? ")
print("1. Addition")
print("2. Subtraction")
print("3. Multiplication")
print("4. Division")
thislist = []
y = True
while True:
try:
user_selection = int(input("My choice is: "))
if user_selection > 0 and user_selection < 5:
break
else:
print("Only integers between 1 and 4 are allowed. Try again")
# CalculatorInputError
except ValueError:
print("Only integers between 1 and 4 are allowed. Try again")
while True:
n1 = input("Type the number and press enter: ")
print("To calculate type '=': ")
if n1 == "=":
break
else:
n1 = int(n1)
thislist.append(n1)
if user_selection == 1:
answer = add(thislist)
print("answer: " + str(answer))
elif user_selection == 2:
answer = subtract(thislist)
print("answer: " + str(answer))
elif user_selection == 3:
answer = multiply(thislist)
print("answer: " + str(answer))
elif user_selection == 4:
for x in range(len(thislist) - 1):
if thislist[x] == 0:
print("cannot divide by zero")
print("")
choose()
answer = divide(thislist)
print("answer: " + str(answer))
else:
print("Invalid selection. please try again")
print("")
from add import add
from subtraction import subtract
from multiply import multiply
from Division import div
print("<-- Menu -->\n1.Division\n2.Multiplicatoin\n3.Subtraction\n4.Addition")
i = input()
if (i == 1):
x = input("enter x value")
y = input("enter y value")
print div(x, y)
elif (i == 3):
x = input("enter x value")
y = input("enter y value")
print subtract(x, y)
elif (i == 2):
x = input("enter x value")
y = input("enter y value")
print multiply(x, y)
elif (i == 4):
x = input("enter x value")
y = input("enter y value")
print add(x, y)
else:
print("wrong input")