Use integers instead of floats in for-loop
Use integers instead of floats in for-loop

While this adds a few more lines to the program, I think it makes it
more explicit where the constants come from. It also faciliates
easier modification of the example.

It's also safer to use an integer instead of a float as a conditional
in a for-loop. This is because floating point values are imprecise.
As a result, you may end up with one more or one fewer iteration than
you anticipated. Integers don't have this disadvantage.

dafrito/alpha,dafrito/alpha,dafrito/alpha