[Tutor] Stuck on some basics re floats
ben+python at benfinney.id.au
Wed Jul 18 04:07:51 EDT 2018
Matthew Polack <matthew.polack at htlc.vic.edu.au> writes:
> I'm a teacher trying to learn Python with my students.
Wonderful! Thank you for choosing Python for teaching your students.
> I am trying to make a very simple 'unit calculator' program...but I get an
> error ..I think python is treating my num1 variable as a text string...not
> an integer.
Yes. You are using the ‘input’ function, built in to Python 3
Read the documentation for that function; when successful, it returns
text (“a string”).
If you want an integer, you will need to explicitly tell Python to
convert the text to an integer value.
To create a new object, a general way is to use the type as a
constructor. The type you want is ‘int’, so use that as the constructor,
and you will (if it succeeds) get a new integer as the return value::
response = input("Enter inches here: ")
inches = int(response)
You will also need to learn about handling conversion errors: Try
entering something that is *not* a representation of an integer and see
what happens. How to handle the error is up to you.
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