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: I even checked older bash and it's still wrong there; like you say set -x shows how it expands. The following things need to be noted when arrays are implemented in Batch Script. An array is a variable that can hold multiple values, where each value has a reference index known as a key. We’re going to execute a command and save its multi-line output into a Bash array. Where 0 is the index of the array and 1 is the value assigned to the first element of the array. As a quick example, here’s a data table representing a two-dimensional array. It only works with a 1-element array of an empty string, not 2 elements. allThreads = (1 2 4 8 16 32 64 128). The first thing we'll do is define an array containing the values of the --threads parameter that we want to test:. Method 3: Bash split string into array using delimiter. Print all elements, each quoted separately. At first glance, the problem looks simple. Arrays are indexed using integers and are zero-based. There is no maximum limit on the size of an array, nor any requirement that members be indexed or assigned contiguously. Bash IF statement is used for conditional branching in the sequential flow of execution of statements.. We shall learn about the syntax of if statement and get a thorough understanding of it with the help of examples. There are the associative arrays and integer-indexed arrays. We can combine read with IFS (Internal Field Separator) to … The Bash provides one-dimensional array variables. Bash does not support multi-dimensional arrays, but there is a way to imitate this functionality, if you absolutely have to. @Michael: Crap, you're right. bash documentation: Accessing Array Elements. Creating Bash Arrays # Arrays in Bash can be initialized in different ways. I guess I didn't test that comment before posting. In this example, all the elements are numbers, but it need not be the case—arrays in Bash can contain both numbers and strings, e.g., myArray=(1 2 "three" 4 "five") is a valid expression. Arrays are not specifically defined as a type in Batch Script but can be implemented. echo "${array[@]}" Print all elements as a single quoted string These index numbers are always integer numbers which start at 0. Elements in arrays are frequently referred to by their index number, which is the position in which they reside in the array. In BASH script it is possible to create type types of array, an indexed array or associative array. 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