Question

please solve Q8 in bluej.

Answer 1

import java.util.Scanner;

public class Program

{

public static void main(String[] args) {

Scanner in=new Scanner(System.in);

int a=in.nextInt();

System.out.print("number enter by you: "+a);

int i=0;

int c=a;

do{

c-=(2*i+1);

i++;

}while(c>0);

if(c==0){

System.out.println(" perfect square number");

}

else{

System.out.println(" not perfect square number");

}

}

}
____________________
without using any loop::
import java.util.Scanner;

public class Program

{
public static void

main(String[] args) {

Scanner sc=new
Scanner(System.in);

int a=sc.nextInt();

if(a<0){
System.out.println("not a perfect square");

}

else{

int temp=(int)(Math.sqrt(a));

int temp1=(int)(Math.pow(temp, 2));

if(temp1==a){
System.out.println("perfect square");

}

else{
System.out.println("not a perfect square");

}

}
}
}