"Ian Egland" <[email protected]> wrote
Actually, nobody told me how to catch it before it occurs
x = input('x = ')
if type(x) == int: # check its an integer
x = int(x) # ok, so convert to a number
else:
print ("Please enter a number")
But that leads to much more complex and inefficient code
so we prefer
try: x = int(input(...))
except: print ('Please enter a number')
PS. Assuming you are using Python v3. If you are using
an earlier version its better(safer) to use raw_input()
rather than input() which is potentially dangerous.
In v3 old style input has been removed and raw_input
replaced with a new safe input()
HTH,
--
Alan Gauld
Author of the Learn to Program web site
http://www.freenetpages.co.uk/hp/alan.gauld
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