Chapter 8: Problem 12

8.12 Look at the following statements: int[] a = { 1, 2, 3, 4, 5, 6, 7 }; int[] b = new int[7]; Write code that copies the a array to the b array.

Short Answer

Expert verified

Answer: The given code uses a for loop with an index variable 'i' initialized to 0. It iterates through the entire array 'a', and at each position 'i', it assigns the value at index 'i' of array 'a' to the corresponding index 'i' of array 'b': b[i] = a[i]. The loop continues until the index reaches the end of array 'a', thus copying all elements from array 'a' to array 'b'.

Step by step solution

Initialize the loop

Start a for loop with an index variable 'i' initialized to 0. This loop will traverse through the entire array 'a' and it will run until 'i' is less than the size of the array 'a' (which has 7 elements).

Copy elements from array 'a' to array 'b'

Inside the loop, assign the value at the current index 'i' of the array 'a' to the corresponding index 'i' of the array 'b': b[i] = a[i]. This means that the element at position 'i' of array 'a' is now copied to the position 'i' of array 'b'

Increment the loop index

Increment the value of the index variable 'i' by 1 in each iteration to move to the next element of the array.

End the loop

The loop should end when the index reaches the end of the array 'a'. This means all elements of the 'a' array have been successfully copied to the 'b' array. Here's the code that solves the exercise: ```java int[] a = { 1, 2, 3, 4, 5, 6, 7 }; int[] b = new int[7]; for (int i = 0; i < a.length; i++) { b[i] = a[i]; } ```

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8.12 Look at the following statements: int[] a = { 1, 2, 3, 4, 5, 6, 7 }; int[] b = new int[7]; Write code that copies the a array to the b array.

Short Answer

Step by step solution

Initialize the loop

Copy elements from array 'a' to array 'b'

Increment the loop index

End the loop

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