Here are questions students raised about the Control Flow worksheet, along with my answers:

QUESTION (Mon, 4 Feb 2008 14:54:16)
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Just wondering if there's any kind of command to make the program loop back to the start? Mostly aesthetic.
This is what I have so far:

a= input("Enter first number here: ")
b= input("Enter number you want to divide the first by: ")
if b==0: print "I see what you did there"
else:
   print a, ("divided by"), b, ("="), float(a)/float(b)

and I want to be able to make a loop command after the "if b==0" bit so that the user has to restart the process and enter a realistic number.

Answer
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Simple - put everything from the 'b=input ...' line onwards into a while loop, which is executed until a sensible number has been entered.