Page 333 - ComputerScience_Class_11

11.3.4 Length of the Array
The total number of elements an array holds is the length of the array. To find the total number of elements in the array,
we use the “length” property. This property returns an integer value. Syntax to use the length property is as follows:
int len= name_of_array.length;
Here, len will contain the length of the array. Let us consider the following example.

Program 7 Write a program to calculate the length of an array.

1 public class ArrayLength
2 {
3 public static void main(String[] args)

4 {
5 String player_name[ ]={"Sourav", "Sanchin", "Rahul", "Suresh", "Bumra"};

6 int length = player_name.length;
7 System.out.println("The length of the array is: " + length);

8 }
9 }

The output of the preceding program is as follows:

BlueJ: Terminal Window - Java
Options

The length of the array is: 5

11.4 DIFFERENT OPERATIONS ON A SINGLE-DIMENSIONAL ARRAY
Different types of operations which can be performed on an array are searching, sorting, insertion, deletion and
merging. Let us learn about them in detail.

11.4.1 Searching
Searching is used to determine whether an element is present in the array or not. In this class, we shall learn about
linear search and binary search.

Linear Search
The other name for linear search is sequential search. Linear search works efficiently on unsorted data. In this
technique, the element to be found is searched from the 1st position of the array till the last position. If found, the
search will stop.
Let us take the following example in which ar is the name of the array of length 5.

Position or index 0 1 2 3 4
Ar 2 4 5 7 9

Suppose, the number to be searched: 5

Arrays 331