Arrays
We just saw how to simplify the program to avoid an obstacle using a My Block (subroutine). Now, we will instead optimize the program using an array, whereas in the LEGO EV3 software, a variable can have one value, an array can have several elements, each with its own value. To learn how an array in EV3 works, you will first need to write a program to display a series of numbers on the EV3 brick screen.
First, clear the display screen. Then define a variable called Steering. By clicking on the mode selector of the Variable block, we can choose to write to an array instead of writing to a numeric variable. The LEGO EV3 software contains numeric and logic (or Boolean) arrays. It does not currently have arrays for strings (or lists).
We will write the series of numbers [100, -100, -100, 100] into the array. You can enter elements by clicking on the input value of the array variable block. This will be useful later when we use this same array variable block in the obstacle code.
We will...
