array[10]="elevenths element" # because it's starting with 0 3.1. 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. bash documentation: Accessing Array Elements. Here is an example: 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 If the index number is @ or *, all members of an array are referenced. 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. We will further elaborate on the power of the associative arrays with the help of various examples. Arrays in Bash. As a quick example, here’s a data table representing a two-dimensional array. Method 3. 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. echo "${array[@]}" Print all elements as a single quoted string Print all elements, each quoted separately. Bash Array Modification Example. These index numbers are always integer numbers which start at 0. 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. In Bash, there are two types of arrays. Getting the array length. In this article, we will explain how you can declare and initialize associative arrays in Linux bash. Print the Whole Bash Array. 3. In your favourite editor type #!/bin/bash And save it somewhere as arrays… Also try putting that command into your script to see what happens. Any variable may be used as an array; the declare builtin will explicitly declare an array. Elements in arrays are frequently referred to by their index number, which is the position in which they reside in the array. To get the length of an array, we can use the {#array[@]} syntax in bash. You can also read array values and array indexes separately by using for loops. Arrays are indexed using integers and are zero-based. These chained printf are used to forge a single parameter that will be safe if some array elements contain space chars. Initialize or update a particular element in the array. The length of an array means, the total number of elements present in the given array. There are the associative arrays and integer-indexed arrays. There are different ways to print the whole elements of the array. 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