Why are arrays useful

Question

explain

Answer 1

If you want to display a lot of numbers.

1. System.out.println(1);
System.out.println(2);
System.out.println(3);

2. int[] arr={1,2,3};
for (int i:arr){
System.out.println(i);}

Array is also easy to maintain👍

Answer 2

Array is collection of elements with the single data type which are stored in adjacent memory location.
For example : if you want to store 50 value for some reason, you will have to declare 50 variables because a single variable can store only one value at a time.
This will make the code long and complex. So in such a situation you need to declare variable that can store 50 values. This can be achieved using arrays

Answer 3

i agree wid Keval Dhanani

Answer 4

An example would be the states in a country. If you create an array of them it is a simple matter to loop through the array and generate the options for a select dropdown rather than hardcoding every single one of them. Especially if you have multiple of them on a site or a form. Then if you change the array in one place all of the dropdown do.

Arrays save time and effort and keep code cleaner and more meaningful than x number of individual variables.

Returns from a database query are stored as arrays as well because of how simple it is to navigate their structure inside of a loop.