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Java Program for linear search

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Linear Search in Java

In this example, we'll see a Java program to search the array elements using the linear search.

Linear search is used to look for a key element from multiple elements. It is less used because it's slower than binary search and hashing.

Algorithm:

Step 1: Traverse the array.
Step 2: Match the key element with array element.
Step 3: If key element is found, return the index position of the array element.
Step 4: If key element is not found, return -1.

Program:


import java.util.Scanner;  
class Main   
{  
public static void main(String args[])  
{  
int c, n, search, array[];  
Scanner in = new Scanner(System.in);  
System.out.println("Enter number of elements");  
n = in.nextInt();   
array = new int[n];  
System.out.println("Enter those " + n + " elements");  
for (c = 0; c < n; c++)  
array[c] = in.nextInt();  
System.out.println("Enter value to find");  
search = in.nextInt();  
for (c = 0; c < n; c++)  
{  
if (array[c] == search)     /* Searching element is present */  
{  
System.out.println(search + " is present at location " + (c + 1) + ".");  
break;  
}  
}  
if (c == n)  /* Element to search isn't present */  
System.out.println(search + " isn't present in array.");  
}  
}

Output:
Enter number of elements
7
Enter those 7 elements
10
39
26
83
66
29
92
Enter value to find
66
66 is present at location 5.

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