The main purpose of this lab exercise is to use the Java constructs we have been studying:

• Arrays
• Control flow statements (conditionals and loops)
• Class and method creation
• Text output

We will accomplish this goal by writing an application that can add and subtract two like matrices. A Matrix is simply a 2 dimensional array, or an array of arrays.

this text file describes the assignment

A few thoughts on the lab…

1. This is another long lab and some lecture material has to be reviewed together
2. I expect that I will allow time from Thursday's lecture to complete the lab.
3. It helps to think of an array as a row of elements and a 2D array as having multiple rows.
4. for a type such as int[][], think of int[number-of-rows][number-of-columns]
5. My recommendation is to use nested for loops to traverse the elements of the matrix.
   1. the first, or outer-most for loop will iterate the rows
   2. the second, or inner-most for loop will iterate the columns (or, if you prefer, a single array)
   3. remember to start counting with element 0.