[Tutor] while and for

[CMNOLEN@aol.com]

I asked earlier for guidance in writing a program to total input from 100 
entries. It  worked great. Now I want the program to contain an 'Enter 0 to 
quit' line. Also I would like a running count of the entries to show in the 
'The sum is now' line. I am stuck. I guess these questions are so basic most 
print doesn't answer them?I am stuck! 

I am using:
#########################################################
total = 0
for  i in range(100):
    total = total + input("Please enter your next number: ")
    print "The sum is now", total
#########################################################