Below is a program that asks the user to input a username and password. Once logged off the user is asked to re-enter their username and password.

Is the program correct where it checks if the username and password input before is correctly input again?.

Any help would be welcome

Regards

Mark

# program that checks that the username and password are correct #

username = input("Please enter your username : ")
password = input("Please enter your password : ")
print ("Greetings," , username, "you are now logged in now with a password")

command = input("Please type a command :")
if command == "log off":
print ("You have now been logged off again",username)
username == ""
password == ""

username = input("Please enter your username : ")
password = input("Please enter your password : ")

while (username != "username" and password != "password")

print (" Sorry username and password incorrect please re-enter for validation ")
username = input("Please enter your username : ")
password = input("Please enter your password : ")

else:
print ("Greetings," , username, "you are now logged in now with your password")

# program that checks that the username and password are correct # 

username = input("Please enter your username : ")
password = input("Please enter your password : ")
print ("Greetings," , username, "you are now logged in now with a password")

command = input("Please type a command :")
if command == "log off":
    print ("You have now been logged off again",username)
    username == ""
    password == ""

username = input("Please enter your username : ")
password = input("Please enter your password : ")

while (username != "username" and password != "password")

    print (" Sorry username and password incorrect please re-enter for validation ")
    username = input("Please enter your username : ")
    password = input("Please enter your password : ")

else:
    print ("Greetings," , username, "you are now logged in now with your password")

Without code tags nobody can read your program.

No, username and password given in first lines is never validated. Line 13 until end without beginning lines serve as good start to prepare the program.

You should put this in a function that you can call repeatedly instead of duplicating code.

I agree with the above posts. My spin on the code would be:

def askUser():
    username = raw_input("Enter your username: ")
    password = raw_input("Enter your password: ")
    checkPass(username, password)

def checkPass(use, pwd):
    if use == "username" and pwd == "password":
        login(use)
    else:
        print "Your username and/or password was incorrect"
        askUser()

def login(use):
    print "Welcome " + use
    print "You have successfully logged in!"
    askCom()

def askCom():
    command = raw_input("Enter your command: ")
    if command == "log off" or command == "quit":
        username = ""
        password = ""
        print "You have logged off"
        askUser()
    else:
        print "Unknown command"
        askCom()

askUser()

Your all happy

Thanks 4 the support on my coding, Helps me with my GCSE's, Helped me understand !=, Cheers.

@WolfSheild how to add a username in your program????