¿Cómo puedo convertir una cadena a un int en Python?
El resultado que obtengo para mi pequeña aplicación de ejemplo es el siguiente:
Welcome to the Calculator!
Please choose what you'd like to do:
0: Addition
1: Subtraction
2: Multiplication
3: Division
4: Quit Application
0
Enter your first number: 1
Enter your second number: 1
Your result is:
11
Esto se debe a que el método suma () toma la entrada () como cadenas y no como números. ¿Cómo puedo usarlos como números?
Aquí está mi guión completo:
def addition(a, b):
return a + b
def subtraction(a, b):
return a - b
def multiplication(a, b):
return a * b
def division(a, b):
return a / b
keepProgramRunning = True
print "Welcome to the Calculator!"
while keepProgramRunning:
print "Please choose what you'd like to do:"
print "0: Addition"
print "1: Subtraction"
print "2: Multiplication"
print "3: Division"
print "4: Quit Application"
#Capture the menu choice.
choice = raw_input()
if choice == "0":
numberA = raw_input("Enter your first number: ")
numberB = raw_input("Enter your second number: ")
print "Your result is:"
print addition(numberA, numberB)
elif choice == "1":
numberA = raw_input("Enter your first number: ")
numberB = raw_input("Enter your second number: ")
print "Your result is:"
print subtraction(numberA, numberB)
elif choice == "2":
numberA = raw_input("Enter your first number: ")
numberB = raw_input("Enter your second number: ")
print "Your result is:"
print multiplication(numberA, numberB)
elif choice == "3":
numberA = raw_input("Enter your first number: ")
numberB = raw_input("Enter your second number: ")
print "Your result is:"
print division(numberA, numberB)
elif choice == "4":
print "Bye!"
keepProgramRunning = False
else:
print "Please choose a valid option."
print "\n"