There are the associative arrays and integer-indexed arrays. These index numbers are always integer numbers which start at 0. Bash does not support multi-dimensional arrays, but there is a way to imitate this functionality, if you absolutely have to. echo "${array[@]}" Print all elements as a single quoted string An array is a variable that can hold multiple values, where each value has a reference index known as a key. Elements in arrays are frequently referred to by their index number, which is the position in which they reside in the array. @nath declare -p is just a quick way to make bash print the real array (index and contents). Arrays are indexed using integers and are zero-based. You don't need this declare -p command in your real script. Unlike in many other programming languages, in bash, an array is not a collection of similar elements. bash documentation: Accessing Array Elements. Instead, bash provides a special operator who does all the work for us. Bash Array â An array is a collection of elements. We can display the length of the whole array or any array element by using a special operator '#'. We can combine read with IFS (Internal Field Separator) to define a delimiter. Arrays in Bash. In Bash, there are two types of arrays. By asking for indexes not in the array you either create an array with indexes missing, ie 0,1,3,6,7,9 This would then mean you have "holes" at positions - 2,4,5,8 and nothing in any index after 9 However, you create your array using the following: In BASH script it is possible to create type types of array, an indexed array or associative array. There is no maximum limit on the size of an array, nor any requirement that members be indexed or assigned contiguously. Since bash 4.3 it is not that easy anymore. Any variable may be used as an array; the declare builtin will explicitly declare an array. Method 3: Bash split string into array using delimiter. Execute the script. Bash arrays have numbered indexes only, but they are sparse, ie you don't have to define all the indexes. No, you need not count them all. The Bash provides one-dimensional array variables. Example: As if this was not complicated enough, with "declare -p", you do not get the type or the original variable. Print all elements, each quoted separately. When using arrays, one must know how many elements are present in the array. As a quick example, hereâs a data table representing a two-dimensional array. Now the myarray contains 3 elements so bash split string into array was successful # /tmp/split-string.sh My array: string1 string2 string3 Number of elements in the array: 3 . With "declare -n" you can add a reference to another variable and you can do this over and over again. 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