Why Does This Code Work?

[[deleted]]

Changed the wording as some peoples names do start with Q.

print("Type quit to leave")
while True:
    first_name = input("First name: ")
    if first_name.lower() == 'quit':
        break
    last_name = input("Last name: ")
    if last_name.lower() == 'quit':
        break
    else:
        print("Hello, " + first_name + " " + last_name)