Basics of Core Java

public class Test 
{ 
  public static void main(String argv[])
   { 
     int[] arr = new int[]{1,2,3};
     System.out.println(arr[1]); 
   } 
}

int [] arr = { 23, 5, 78, 34, 2};

public class Test
{
 public static void main(String[] args)
 {
  int j = 5;
  for (int i = 0; i< j; i++)
  {
    if ( i <= j-- )
       System.out.print(  (i*j)  + " ");
  }
 }
}

public class Test {
  public static void main(String[] args)
  {
    double d = 100.04;  
    float f = d;	
    System.out.println("Float value "+f);
  }
}