# 8.15. Code Practice with Arrays¶

Fix the following code so that it prints every other value in the array `arr1` starting with the value at index 0.

Change line 5 to add the `[]` on the declaration of `arr1` to show that it is an array of integer values. Change line 6 to `index < arr1.length` so that you don’t go out of bounds (the last valid index is the length minus one). Change line 8 to print `arr1[index]`.

Fix the following to print the values in the array `a1` starting with the value at the last index and then backwards to the value at the first index.

Change line 6 to `a1.length - 1` since the last valid index is one less than the length of the array and `i >= 0` since the first valid index is 0. Change line 7 to `a1`.

Rewrite the following code so that it prints all the values in an array `arr1` using a for-each loop instead of a `for` loop.

In a for-each loop you specify the type of the values in the array, a name for the current value, and then a `:` and then the name of the array. The first time through the loop the value will be the one at index 0. The next time the one at index 1 and so on until you reach the last value in the array.

Finish the following code so that it prints out all of the odd values in the array `a1`.

If the remainder of the value divided by 2 is 1 then it is odd so print it out followed by a space (to keep the values separated).

Finish the following method `getSum` to return the sum of all values in the passed array.

Declare a variable to hold the `sum` and initialize it to zero. Loop through all the values in the array using a for-each loop and add each value to the `sum`. Return the `sum`.

Finish the following method to return the sum of all of the non-negative values in the passed array.

Declare a variable to hold the `sum` and initialize it to zero. Loop through all the values in the array. If the current value is non negative (greater than or equal to 0) then add it to the `sum`. Return the `sum`.

Finish the following code to print the strings at the odd indices in the array.

Use a for loop and start the index at 1 and increment it by 2 each time through the loop. Print the value at the index.

Finish the method `getSumChars` below to return the total number of characters in the array of strings `strArr`.

Declare the `sum` and initialize it to 0. Use a for-each loop to loop through each string in the array. Add the length of the current string to the `sum`. Return the `sum`.

Finish the method `findMin` so that it finds and returns the minimum value in the array.
Finish the method `getAverage` to calculate and return the average of all of the values in the array.
Declare a variable to hold the `total` and it should be of type `double` so that the average is a `double`. Initialize it to 0. Loop through all the values in the array and add each to the `total`. Return the `total` divided by the length of the array.