Once we’ve created our array, we can access individual array elements by placing the index of that element inside of the square brackets `[]` following the variable name.

Array indexes in Java start at 0. So, to access the first element of an array named `x`, we would use `x[0]`.

Similarly, the last array index is one less than the total size of the array. If the array named `x` has a size of 5, then the last element would be `x[4]`.

Let’s take a look at an example in the code below. It will create an array of 5 integers, assign those integers a value, then sum them up and print the result.

``````public static void main(String[] args){
//create an integer array
int[] a = new int[5];

//assign array elements
a[0] = 5;
a[1] = 10;
a[2] = 15;
a[3] = 20;
a[4] = 25;

//create a sum variable
int sum = 0;

//add up all the elements in the array
sum = sum + a[0];
sum = sum + a[1];
sum = sum + a[2];
sum = sum + a[3];
sum = sum + a[4];

//print the sum (it should be 75)
System.out.println(sum);
}``````

Feel free to copy this code to a file named `Array.java` and modify the code to try other operations with arrays. Notice that the code above is simply a `main` method, so you’ll have to add the appropriate class declaration for the `Array` class in order to run this code!