Array/List in Bash

Array/List is the collection of values that helps you to improve your productivity. You can create an Array/List like the following code with single/double quotes separated by space, not comma.

Run the following code to create an array/list in bash.

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fruits=("apple" "banana" "orange" "grapes")

Return all positional arguments as a separate string.

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echo ${fruits[@]}

Return a total number of arguments of the array, or return the length of the array.

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echo ${#fruits[@]}

You can call indexes like this same as python, or any other programming languages.

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echo ${fruits[0]}
echo ${fruits[1]}
# so on...

To insert/push new item at the end of array.

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fruits+=("watermelon")

To update item at specific index.

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fruits[3]="blueberries"

To remove item by index from the array.

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unset fruits[2]

To remove item by value from the array.

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fruits=( ${fruits[@]/apple/} )