What is returned by the following code? Assume that getStockPrices is a method that returns a 2-by-31 array, with the first row containing the stock price at the beginning of the day and the last row containing the stock price at the end of the day, for each day of the month.

Question

```
1 private int[] mystery()
2 {
3 int[][] prices = new int[ 2 ][ 31 ];
4
5 prices = getStockPrices();
6
7 int[] result = new int[ 31 ];
8
9 for ( int i = 0; i<= 30; i++ )
10 {
11 result[ i ] = prices[ 0 ][ i ] - prices[ 1 ][ i ];
12
13 } // end for
14
15 return result;
16
17 } // end method mystery
```

Answer 1

This code returns an int array of 31 cells containing the day’s beginning stock price minus the day’s ending stock price, which means it is an array holding the amount of stock profit or loss for each day of the month.