Need another program with and if-else, array, and for loop

Please. If you can make it I will love you forever. Please I need a program (doesn't matter what about, doesn't have to be advanced). I just need a study guide for my big Java I final coming up.

The program needs:
-For loop
-Array
-If-else statement

Thanks. Hope somebody can help me.

The following is not a full program, but sample codes.

Code:

---

// For loop & Array & If-else program

//Creating array of length 21
String[] array = new String[20];

// Code for filling array with number 0 - 20
for( int i = 0; i < array.length -1; i++ )
{
    array[i] = i;
}

// If-else statement
if (array != null)
{
    System.out.println("Array is not empty");
}
else
{
    System.out.println("Array is empty");
}

---

Thanks very much!

+rep