'while' loop runs when code entered above to weed out certain inputs

Question

I can't figure out why my code isn't weeding out any floats and is letting them run in the while loop (which then screws up the code). Is there something I can do to safeguard the 'while loop' - make it not run whenever a float is put in the input?

Here is my code:

if not a.isdigit() and int(a) < 0 and not b.isdigit() and int(b) < 0 :
     print("Invalid input")     
 else :
     count = 1
     while count < int(b) :
         c = count * int(a)
         print('{} * {} = {}'.format(count, a, c))
         count = count + 1
     c = int(a) * int(b)
     print('{} * {} = {}'.format(b, a, c))

a = input("Enter the number for 'num': ") b = input("Enter the number for 'N': ") — Henry McIntosh, Mar 31 '15 at 00:44
1 * 4 = 4 2 * 4 = 8 3 * 4 = 12 4 * 4 = 16 5 * 4 = 20 6 * 4 = 24 7 * 4 = 28 8 * 4 = 32 9 * 4 = 36 10 * 4 = 40 — Henry McIntosh, Mar 31 '15 at 00:45
You only spit out an error if everything that could possibly go wrong went wrong, rather than if something has gone wrong. — user2357112, Mar 31 '15 at 00:47

score 1 · Accepted Answer · answered Mar 31 '15 at 00:45

1

You might need to change those ands to ors so that any of those conditions (a.isdigit(), int(a) < 0, etc.) being true will result in avoiding the loop.

answered Mar 31 '15 at 00:45

TigerhawkT3

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You are an absolute Jet Mate!!!! I love you :D i spent way too long trying alternative code – Henry McIntosh Mar 31 '15 at 00:50

score 0 · Answer 2 · answered Mar 31 '15 at 00:44

0

Check upfront whether b has decimals:

if round(b)==b:

answered Mar 31 '15 at 00:44

aaaaa says reinstate Monica

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'while' loop runs when code entered above to weed out certain inputs

2 Answers2