If you are not familiar with arrays, check out our article Getting Started with Arrays in Bash Shell Scripting.

Let's say you have an array of fruit.

fruit=(banana apple orange grapes)

The += operator can be used to append values to the array. In this example, pineapple is appended to the fruit array.

fruit+=(pineapple)

Here is how to print every element in the array.

echo ${food[*]}

Which should return the following.

apple banana orange grapes pineapple

Or, a for loop can be used to iterate over each item in the array, like this.

for item in ${fruit[@]}; do
  echo $item
done

Which should return the following.

apple
banana
orange
grape
pineapple