how to convert an integer to a float?

[jeff]

On Feb 27, 7:05 pm, "ying... at gmail.com" <ying... at gmail.com> wrote:
> Hi, I have the following functions,  but ' dx = abs(i2 - i1)/min(i2,
> i1)' always return 0, can you please tell me how can i convert it from
> an integer to float?
>
> def compareValue(n1, n2):
>     i1 = int(n1)
>     i2 = int(n2)
>
>     dx = abs(i2 - i1)/min(i2, i1)
>     print dx
>     return dx < 0.05

x = x + 0.0