In this chapter, we will explore the concept of nested loops. Nested loops are loops within loops, and they are a powerful tool in programming that allows us to perform repeated actions in a structured way. By using nested loops, we can efficiently navigate and manipulate complex structures, such as grids, which is exactly what our Knight will be doing in this chapter.

Imagine our Knight moving through a grid, collecting coin. The grid is made up of rows and columns, and our goal is to collect all the coins scattered across this grid. To achieve this, we can use nested loops: one loop to move across the rows and another loop to move through each column.

Let's take a look at an example to understand how nested loops work in the context of our Knight Game:

In the example above, we have two functions: knight_controller and loot_column. The knight_controller function uses a while loop to move the Knight across the grid from left to right. For each column, it calls the loot_column function, which contains another while loop to move the Knight upwards, collecting coins as it goes. Once the Knight reaches the top of the column, it uses a for loop to move back down to its original position.

By nesting the while loop inside the loot_column function within the while loop of the knight_controller function, we can efficiently collect all the coins in each column before moving to the next one.