In the following example, we loop through a list of numbers, and use the variable digit to hold each number in turn: Strings in Python are considered “sequences” — they can be iterated over ...

10 total = 0 # initialize total value = 1 # we start the calculation from 1 while value <= 10: total = total + value value = value + 1 print total # check answer Note: We use the same examples to ...

If you’ve ever written any Python at all, the chances are you’ve used iterators without even realising it. Writing your own and using them in your programs can provide significant performance ...