FAQ: 2D Arrays: Java - Traversing 2D Arrays: Introduction

This community-built FAQ covers the “Traversing 2D Arrays: Introduction” exercise from the lesson “2D Arrays: Java”.

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Happy New Year everyone!
Really hoped to finish this course by the end of 2020, but made only to Learn Java[ 11 ][ 6 ] (or [ 10 ][ 5 ] when taking into account that indeces start from 0).
The third exercise:

Store the number of columns in intMatrix into a variable called columns and the number of rows in intMatrix into a variable called rows .

was a bit confusing, because I couldn’t understand why I would I do something twice (since the same thing was covered in exercises 1 and 2).
And I’m sure glad that Java wasn’t my first language to learn. There is a great deal of mindbending with all the classes, constructors, polymorphism keywords and boilerplate code.