3. Print the Whole Bash Array. Execute the shell script, and the variable is successfully converted into array and the strings can be iterated separately # /tmp/split-string.sh My array: string1 string2 string3 Number of elements in the array: 3 Method 4: Bash split string into array using tr To get the length of an array, we can use the {#array[@]} syntax in bash. Perl). There is no maximum limit on the size of an array, nor any requirement that members be indexed or assigned contiguously. Also try putting that command into your script to see what happens. Getting the array length. Method 3. There are different ways to print the whole elements of the array. Any variable may be used as an array; the declare builtin will explicitly declare an array. You can use associative arrays if your bash is recent enough: unset assoc declare -A assoc assoc["1.2.3"]=x But, I'd rather switch to a language that supports multidimensional arrays (e.g. Change Index. Arrays in Bash. Modify array, adding elements to the end if no subscript is specified. The length of an array means, the total number of elements present in the given array. Initialize or update a particular element in the array. In this article, we will explain how you can declare and initialize associative arrays in Linux bash. If your interactive shell is bash, you can look at the structure of the array you've created using declare -p messages to see if the problem you're experiencing is in the assignment or the display of the array contents. Here is an example: We will further elaborate on the power of the associative arrays with the help of various examples. There are the associative arrays and integer-indexed arrays. You can traverse through the array elements and print it, using looping statements in bash. Associative arrays are an abstract data type similar to dictionaries or maps. In this tutorial, we are going to learn about how to find the length of an array in Bash. The Bash provides one-dimensional array variables. Pre-requistites Knowing how to declare an array and set its elements Knowing how to get the indices of an array Knowing how to cycle through an array Setup This is the same setup as the previous post Let’s make a shell script. These chained printf are used to forge a single parameter that will be safe if some array elements contain space chars. Arrays are indexed using integers and are zero-based. In Bash, there are two types of arrays. echo "${array[@]}" Print all elements as a single quoted string Bash does not support multi-dimensional arrays, but there is a way to imitate this functionality, if you absolutely have to. You can also read array values and array indexes separately by using for loops. Elements in arrays are frequently referred to by their index number, which is the position in which they reside in the array. Bash Array Modification Example. bash documentation: Accessing Array Elements. 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