Unable to access a string on the "3. Converting Ages to Decades" mission

Hello,

Right now I am doing the Python Data Analysis Basics and I am on page 3/11.

So in order to access the first number of the age (we want to make it a decade) This is the answer:

decades=

    if row == 'Unknown':
        decade = row
    else:
        decade = str(row)
        decade = decade[0:-1] + '0s'
    decades.append(decade)

However, I wanted to slice it with decade = decade[0] + "0s". Why am I unable to do it that way since I’m just interested in the first character of the string?

I don’t know if there’s something wrong with my logic or it’s just something from the platform that requires the first way.

Hi! Here’s a hint that will help: what decade would those older than 99 fall into?

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