Why do we use arrays

Arrays are named like variables. The number in brackets determines how many data items the array can hold. The array score 9 would allow ten data items to be stored. Any facility that holds more than one item of data is known as a data structure. Therefore, an array is a data structure. What is an array? Instead of having ten variables, each holding a score, there could be one array that holds all the related data: score 9 By using this array, all 10 data items can be stored in one place.

All arrays have 0 as the index of their first element which is also called the base index and the last index of an array will be the total size of the array minus 1. An element is accessed by indexing the array name. This is done by placing the index of the element within square brackets after the name of the array.

The above statement will take the 10th element from the array and assign the value to var variable. The following example uses all the above-mentioned three concepts viz. Following is the equivalent program written in Java. Java supports arrays, but there is a little difference in the way they are created in Java using the new operator.

You can try to execute the following program to see the output, which must be identical to the result generated by the above C example. Python does not have a concept of Array, instead Python provides another data structure called list , which provides similar functionality as arrays in any other language.

Computer Programming - Arrays Advertisements. Previous Page. Then we can arrange those objects into an array. Your email address will not be published. This site uses Akismet to reduce spam. Learn how your comment data is processed. In math, we generally see arrays with rows and columns of dots, like this: However, arrays appear in real life too! Take a look at these pictures below: Why are arrays useful? When should arrays be used? Arrays are essential as a tool for multiplication.

For example, a 4 by 3 array has the same number of objects as a 3 by 4 array. Have students show equal groups using an array.