On 11/15/2013 9:15 PM, Arturo B wrote:
Hi! I hope you can help me.
I'm writting a simple piece of code.
I need to keep asking for a number until it has all this specifications:
- It is a number
- It's lenght is 3
- The hundred's digit differs from the one's digit by at least two
My problem is that I enter a valid number like: 123, 321, 159, 346... and it
keeps asking for a valid number.
If you enter a 'valid' number at first try, it works fine.
Here's mi code:
res = input('Give me a number --> ')
hundreds = int(res[0])
ones = int(res[2])
# checks if the user enters a valid number
while not res.isdigit() or not len(res) == 3 or abs(hundreds - ones) <= 2:
Look at that last condition *carefully*!!!!
res = input('Enter a valid number --> ')
--
Terry Jan Reedy
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