Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

Python Python Basics (2015) Logic in Python Try and Except

Error says cannot convert string to float

The question asks to use float() before adding, but I keep getting an error. Are my arguments supposed to be numbers?

def add(num1, num2):
  return(float(num1 + num2))

1 Answer

Jennifer Nordell
Jennifer Nordell
Treehouse Teacher

No they aren't. But the way you have the code now it adds the numbers then converts the sum to a float. You want to try to make them floats before you add them. See this code:

def add(num1, num2):
  return float(num1) + float(num2)