Python Calculator Code

Question

I'm fairly new to python and have tried to develop a calculator. I have created it so that it keeps asking you questions until you press 9 and exits. I have made an error while doing this and it keeps asking me to enter first number and keeps looping that

loop = 1
oper = 0

while loop == 1:    
    num1 = input("Enter the first number: ")
    print num1

    oper = input("+, -, *, /,9: ")
    print oper

    num2 = input("Enter the second number: ")
    print num2

    if oper == "+":
        result = int(num1) + int(num2)
    elif oper == "-":
        result = int(num1) - int(num2)
    elif oper == "*":
        result = int(num1) * int(num2)
    elif oper == "/":
        result = int(num1) / int(num2)
    elif oper == "9":
        loop = 0


    print "The result of " + str(num1) + str(oper) + str(num2) + " is " + str(result)

    input("\nPress 9 to exit.")

Answer 1

You had problem with indentation and here's a better way to exit using break for the while loop:

loop = 1
oper = 0

while loop == 1:

    x = input("Press 9 to exit otherwise anything to continue:")#much better way
    if x == "9":
        break
    num1 = input("Enter the first number: ")
    print (num1)

    oper = input("+, -, *, /: ")
    print (oper)

    num2 = input("Enter the second number: ")
    print (num2)

    if oper == "+":
        result = int(num1) + int(num2)
    elif oper == "-":
        result = int(num1) - int(num2)
    elif oper == "*":
        result = int(num1) * int(num2)
    elif oper == "/":
        result = int(num1) / int(num2):
    else:
       print("Invalid operator!") #if user inputs something else other than those


    print ("The result of " + str(num1) + str(oper) + str(num2) + " is " + str(result))