Welcome to the Treehouse Community
Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.
Start your free trial
test account
565 Pointsexcept ValueError
Here is the challenge: You're doing great! Just one more task but it's a bigger one. Right now, we turn everything into a float. That's great so long as we're getting numbers or numbers as a string. We should handle cases where we get a non-number, though. Add a try block before where you turn your arguments into floats. Then add an except to catch the possible ValueError. Inside the except block, return None. If you're following the structure from the videos, add an else: for your final return of the added floats. My answer fails; but I can't tell what I am doing wrong. My original syntax was this def add(num1, num2): return(float(num1) + float(num2))
def add(num1, num2):
try:
return(float(num1) + float(num2))
except ValueError:
return ("None")
else:
return(float(num1) + float(num2))
1 Answer
Henrik Christensen
Python Web Development Techdegree Student 38,322 PointsThis return the string None
return ("None") # incorrect
return None # correct
If you're following the structure from the videos, add an else: for your final return of the added floats.: You don't need the else since your try and else are identical (not sure if this would make the challenge fail)