Swift Programming Logic, #93: 2D Arrays

*I wrongly used the term jagged array, what I explain in the tutorial is a 2D array, however a jagged array is where there is no guarantee that all the rows of the array will be the same length*

In this tutorial I will show you what jagged arrays are, and why they are very useful. I will explain with an example showing you how to create a mean table and calculate the mean of some numbers with a 2D array.