I was doing a simple training prog to figure change, and wanted to avoid
computer inaccuracy by using only two-decimal input and not using division
or mod where it would cause error. Yet, on a simple subtraction I got a
decimal error instead of a two decimal result, as per below. What gives?
cost = float(input('How much did the item cost?: '))
paid = float(input('How much did the customer give you?: '))
change = paid - cost
*#using 22.89 as cost and 248.76 as paid*
twenties = int(change / 20)
if twenties != 0:
twentiesAmount = 20 * twenties
change = change - twentiesAmount
*#change is 5.8700000000000045, not 5.87 - how did I get this decimal
error when simply subtracting an integer from what should be a
#two-decimal amount?
* print(twenties, ' twenties')
print(change)
#and so forth for the rest of the change
--
*Jim Mooney
If you shoot a child you're a bad guy. If you splatter forty children
across a wall with a bomb, you're a heroic, manly Top Gun with gleaming Tom
Cruise teeth. The moral is you'll get laid more if you snuff a lot of
children than if you only snuff a few.*
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