When you try to call list ('123'), Python thinks you're trying to call your own list, not the built-in function. So, always use descriptive names that don’t clash with Python's core features.

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 ...