[Tutor] Please help me to see what's wrong with the code

[ivan low]

word = []
function = None
while function != "0":
    
    entry = raw_input("enter function: ")
    
    #continue the game
    if function == "0":
        print "Welcome to word game 2.0"
        
    #add word to the list
    elif function == "1":
        add = raw_input("Please add word: ")
        new = (add)
        word.append(new)

Does anybody know what is wrong with the code.
When I enter function #1 I can't access the "please add word"
The loop just continue displaying the number I had enter in "entry"

Ivan