[Tutor] Issue with string method: str(variable ** n)

[Rafael Knuth]

Hej,

I wrote a tiny little program which I was hoping would take a number as
input, square and print it:

square = input ("Enter a number. ")
print (str(square) + " squared is " + str(square ** 2))

It seems I can't work with variables within the str() string method, and I
was wondering if anyone can help?

PS. I am using Python 3.3.0

Thank you in advance!

Rafael
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