Question

Write a program to store 20 numbers in a Single Dimensional Array (SDA). Now, display only those numbers that are perfect squares. 

n[0]	n[1]	n[2]	n[3]	n[4]	n[5]	n[6]	n[7]	n[8]	n[9]
12	45	49	78	64	77	81	99	45	33

Sample Output: 49, 64, 81 

Answer 1

import java.util.*;
public class AQ9 
{ public static void main(String args[])
{Scanner ob = new Scanner(System.in);
int i, y, a[] = new int[20]; 

System.out.println("Enter 20 numbers");
for (i = 0; i < a.length; i++)
a[i] = ob.nextInt(); 

System.out.println("\nThe numbers that are Perfect Squares are");
for (i = 0; i < a.length; i++)
{y = (int) Math.sqrt(a[i]);
if (a[i] == y * y)
System.out.println(a[i]);
}}}