Calculating a sum in a loop While we have the Python built-in function sum() which sums the elements of a sequence (provided the elements of the sequence are all of numeric type), it’s instructive to ...

# Lists are one of Python's data structures used to group/collect data into a single variable. Items in a list can be accessed and modified individually or as a group. Items can be accessed with their ...

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 perfo… ...

Loops allow parts of code to be repeated over some number of times. Let's consider an example. Suppose we want to take a word and print out each letter of the word separately. We could do the ...