Python
Paul Rubin
phr-n2003b at NOSPAMnightsong.com
Thu Feb 6 22:46:34 EST 2003
phrogeeb at hotmail.com (Uri) writes:
> Ok, so Python vets I bet are already seeing what my problem is. I ask
> for the numbers with the syntax: r = input("r?")
>
> My problem is that r is a percentage (in my program, I tell the user
> to represent 4% as .04). When I run the program, it says that there's
> no way to deal with a double or something to that effect. But I also
> read that there's no way to type a variable, that they are
> "dynamically typed". Well, that doesn't work here.
The problem is the input function returns a string, not a float.
To convert a string to a float, use the "float" function, like
e = float("2.71828")
Also, you should use raw_input rather than input, to get exactly
what the user types. So you'd write your example
r = float(raw_input("r? "))
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