def add(x, y):

return x + y

def subtract(x, y):

return x - y

def multiply(x, y):

return x * y

def divide(x, y):

return x / y

while True:

try:

num1 = float(input("Enter first number: "))

num2 = float(input("Enter second number: "))

except ValueError as ERROR:

print("Invalid input")

print(ERROR)

print("FIRST LEARN FOR WHAT THE CALCULATOR IS MADE FOR THEN COME BACK")

break

print("Select operation:")

print("Press 1 for Adding")

print("Press 2 for Subtraction")

print("Press 3 for Multiplication")

print("Press 4 for Division")

choice = input("Enter choice(1/2/3/4): ")

if choice in ('1', '2', '3', '4'):

if choice == '1':

try:

print(num1, "+", num2, "=", add(num1, num2))

except NameError as ERROR:

print("Invalid input\n")

print(ERROR)

elif choice == '2':

try:

print(num1, "-", num2, "=", subtract(num1, num2))

except NameError as ERROR:

print("Invalid input\n")

print(ERROR)

elif choice == '3':

try:

print(num1, "*", num2, "=", multiply(num1, num2))

except NameError as ERROR:

print("Invalid input\n")

print(ERROR)

elif choice == '4':

try:

print(num1, "/", num2, "=", divide(num1, num2))

except ZeroDivisionError as error:

print("Can't divide by zero")

print(error)

next_calculation = input("Let's do next calculation? (yes/no): ")

if next_calculation == "no":

print("calculator closed")

break

else:

print("Invalid Input")