How to Find Array Length in Java

In Java, an array's length signifies its capacity, accessible via the length attribute. This attribute, specific to arrays, reveals the number of elements it holds. While Java lacks a dedicated method for this, accessing length with the array's name provides quick insight into its size. Arrays store uniform-type elements in a fixed-size structure. Syntax:

Implementation Of length Attribute

The number of elements in the array at the time of declaration is referred to as the array's size or length. The length of an array named A is supplied by the following code:

Let’s take few examples to understand how length attributes really work.

Example: 1

Output:

Example: 2

Output:

Example: 3

Output:

Using Array Length In Java To Search A Value

We already know that the length attribute in Java arrays can be utilized to traverse them. The loop will iterate through all of the items until the last element is reached (since arrays start from 0).

This loop can be used to determine whether a specific value exists in the array. This will be achieved by traversing the full array until the last element is reached. While traversing, each element is compared to the value to be searched, and if a match is discovered, the traversal is terminated.

The below code snippet demonstrates searching for a value in an array:

Output:

Explanation:

We have an array of programming language names in the preceding program. We also have a function called searchValue that looks for a specific programming language name. In the method searchValue, we used a for loop to cycle over the array and look for the supplied name. The function returns true once the name has been located. If the name is not present or the array is full, the method returns false.

Finding The Minimum And Maximum Values In Array

We can also utilize the length attribute of Java arrays to traverse the array and find the minimum and maximum elements. The array may or may not be ordered. To find the lowest or greatest element in an array, compare each element until all of the items in the array are exhausted, and then find the smallest or greatest element in the array.

The below code snippet is used to find the minimum element in a array :

Output :

In the above program, we use the first element of the array as a reference element in the above code snippet. Then, one by one, we compare each item to this reference element, choosing the smaller one by the time we reach the end of the array.

We can also locate the maximum element in the array using identical logic, the only difference is that instead of finding the element less than the reference element, we will find the element larger than the reference element.