1. The initial values must be set up correctly.
2. The condition in the `while` loop must be correct.
3. The change in variable(s) must be done correctly.

# Counting Upwards by Two's

A change in one of these parts will change the behavior of the loop. Here is a program fragment that counts upwards by two's:

```int count = 0;            // count is initialized
while ( count <= 6 )      // count is tested
{
System.out.println( "count is:" + count );
count = count + 2;      // count is increased by 2
}
System.out.println( "Done counting by two's." );
```

Here is what the program prints:

```count is: 0
count is: 2
count is: 4
count is: 6
Done counting by two's.
```

Here is what happens, step-by-tedious-step:

1. `count` is initialized to 0.
2. The condition, `count <= 6` is evaluated, yielding TRUE.
3. The loop body is executed, printing "count is: 0" and adding 2 to `count`.
• `count` is now 2.
4. The condition, `count <= 6` is evaluated, yielding TRUE
5. .
6. The loop body is executed, printing "count is: 2" and adding 2 to `count`.
• `count` is now 4.
7. The condition, `count <= 6` is evaluated, yielding TRUE.
8. The loop body is executed, printing "count is: 4" and adding 2 to `count`.
• `count` is now 6.
9. The condition, `count <= 6` is evaluated, yielding TRUE.
10. The loop body is executed, printing "count is: 6" and adding 2 to count.
• `count` is now 8.
11. The condition, `count <= 6` is evaluated, yielding FALSE.
12. The body of the loop is skipped and the statement after the body is executed.

### QUESTION 2:

Make just one change to the loop. Change the initialization to:

```int count = 1;
```

What does the program print out? (This is a slightly tricky question. Please take time to work out the answer.)