This page contains general information regarding the use of arrays
An array is a collection of variables of the same datatype. The only thing to separate the variables are their index number. In the image below you can see each bucket has an index number
This is essentially one single variable which contains several variables ( in the case of the image above its 7 variables). Each of the variables in the array can be called separately or collectively.
The first index of an array is always 0. In the example above the length of the array is 7 but the last index number is 6 as the the total sum of index are 7 but 0 is also counted. Therefore the last index in above example is 6
Example of array use
For a chance of better understanding the code when reading it. Always use names in plural when creating names for arrays. Example below is “numbers”
While creating an array. Do always specify the datatype int on both sides of the = sign. The purpose of this is to make sure the compiler knows the datatype of the so-called “main” and “sub“ variables.
*main being the datatype on the left of the = sign and sub being on the right*
int [] numbers = new int [9];
In the example above the length of the array is 9 but the last index number is 8 ← explained here
Creating and assigning values to an array is done as follows
int [] numbers = { 4, 5, 6, 1, 2, 3, -2, -1, 0};
In above example we have created an array called numberswhich has a length of 9 (8 total index numbers as 0 is included in the count) where all the index numbers has been assigned a value