Once again, run a for loop with a range. Inside the loop, use the power of 2. Then add that power to a sum variable. That’s it. This one is super easy. You declared a variable sum with an initial ...

In calculations like this we call the variable, sum_, an accumulator (because it accumulates the values of the elements in the iteration). That’s how we calculate a sum in a loop! Loops and summations ...

The for loop construction in Python easily iterates over a collection of items. Here’s what you need to know to use it well.

Recursion provides opportunities for you to come up with elegant solutions to difficult problems, and loops do for regular everyday jobs efficiency and simplicity. Python programmers have an ...