While Loops vs. If-Else

Hi! Just getting started here on Treehouse and this is my first post in the forums, so I apologize if this is formatted incorrectly.

I just learned about While Loops and although I think I understand the general concept, I'm not sure I understand why you would use a while loop instead of just an if-else setup.

For example, what makes the following pieces of code any different? The first is essentially the password checker code Craig writes in the while loops video, the second is a similar program using if and else instead. Is one any better than the other? They seem to produce the same exact result. Really, I'm just curious about what situations would require while loops rather than an if-else combination.

# While Loop version
password = input("Please enter your password: ")
while password != "password":
    password = input("Sorry! The password you entered is incorrect. Please try again: ")
print("Sign in successful!")

# If-else version
password = input("Please enter your password: ")
if password == "password":
    print("Sign in successful!")
else:
    password = input("Sorry! The password you entered is incorrect. Please try again: ")

Thanks in advance for your help!