FRQ 1 • 6 min read

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1

a.

Answer:

public static int arraySum(int[] arr) {
  // Initialize a variable to hold the sum
  int sum = 0;

  // Iterate over each element in the array
  for (int i = 0; i < arr.length; i++) {
    sum += arr[i];
  }

  return sum;
}

int[] arr = {1, 3, 2, 7, 3};
int sum = arraySum(arr);
System.out.println("The sum of the array is: " + sum);

code output:

The sum of the array is: 16

b.

Answer:

Answer:

public static int[] rowSums(int[][] arr2D) {
  int numRows = arr2D.length;  // Get the number of rows in the 2D array
  int[] sums = new int[numRows]; // Create a new 1D array to store the row sumsw

  for (int i = 0; i < numRows; i++) {
    sums[i] = arraySum(arr2D[i]); // Use the arraySum method to calculate the sum of each row and store it in the sums array
  }

  return sums;
}

//2d array 1-9 but i cant commit if it is here, so just imagine it divided into three brackets 
int[] sums = rowSums(arr2D);

for (int i = 0; i < sums.length; i++) {
  System.out.println("The sum of row " + i + " is: " + sums[i]);
}

The sum of row 0 is: 6
The sum of row 1 is: 15
The sum of row 2 is: 24

c.

Answer:

FRQ #1

public class ArraySum { //class
  // This method takes an array of integers as input and returns their sum
  public static int arraySum(int[] arr) {
      // Initialize a variable to hold the sum
      int sum = 0;

      // Iterate over each element in the array
      for (int i = 0; i < arr.length; i++) {
          // Add the current element to the sum
          sum += arr[i];
      }

      // Return the total sum
      return sum;
  }

  public static void main(String[] args) { //main method
      // Define an array of integers
      int[] arr = {1, 3, 2, 7, 3};
      // Calculate the sum of the array elements
      int sum = arraySum(arr); // 16
      System.out.println("The sum of the array is: " + sum); //prints out "the sum of the array"
  }
}

ArraySum.main(null);

The sum of the array is: 16