if then elif
byte8bits at gmail.com
Wed Oct 10 22:58:32 CEST 2007
Shawn Minisall wrote:
> I just learned about if, then elif statements and wrote this program.
> The problem is, it's displaying all of the possibilities even after you
> enter a 0, or if the fat grams are more then the total number of
> calories , that is supposed to stop the program instead of continuing on
> with the print statements that don't apply. Any idea's? thanks
1. Use raw_input instead of input or errors will occur should users
enter non-numeric characters.
> #Prompt for calories
> cal = input("Please enter the number of calories in your food: ")
> #Prompt for fat
> fat = input("Please enter the number of fat grams in your food: ")
2. Convert cal and fat to ints or floats for your calculations... maybe
something like this:
sys.exit(str(e) + "Enter a number!!!")
This will catch things that cannot be converted to an int (bad user input)
Besides that, I'm pretty sure your calculations are wrong.
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