Question

assume that an int variable named sum has been declared, and a two-dimensional array of ints named a2d has been created and assigned values. write some statements that calculate the sum of all the elements in the two-dimensional array and assign the value to sum.

Answer 1

Here is the code:

sum = 0; // Initialize sum to zero
for (int i = 0; i < a2d.length; i++) {
for (int j = 0; j < a2d[i].length; j++) {
sum += a2d[i][j]; // Add each element to sum
}
}

Step-by-step explanation:

If you want to calculate the sum of all the elements in a two-dimensional array named a2d and assign it to an int variable named sum, you can use a nested for-loop to iterate through the array.

Here is how you could write the code:

sum = 0; // Initialize sum to zero
for (int i = 0; i < a2d.length; i++) {
for (int j = 0; j < a2d[i].length; j++) {
sum += a2d [i] [j]; // Add each element to sum
}
}
The outer loop runs through each row of the 2D array, while the inner loop runs through each element of the current row, adding each element's value to the sum.