Question

Given a 2D array int[][] data = {{1,2},{3,4},{5,6}};, which code snippet correctly calculates the sum of all elements?

Accepted Answer

int sum = 0;
for(int i=0; i<data.length; i++) {
  for(int j=0; j<data[i].length; j++) {
    sum += data[i][j];
  }
}
System.out.println(sum);

Answer

int sum = 0;
for(int i=0; i<data.length; i++) {
  for(int j=0; j<data.length; j++) {
    sum += data[j][i];
  }
}
System.out.println(sum);

Answer

int sum = 0;
for(int i=0; i<data[0].length; i++) {
  for(int j=0; j<data.length; j++) {
    sum += data[i][j];
  }
}
System.out.println(sum);

Answer

int sum = 0;
for(int i=0; i<data.length; i++) {
  sum += data[i];
}
System.out.println(sum);

Given a 2D array int[][] data = {{1,2},{3,4},{5,6}};, which code snippet correctly calculates the sum of all elements?

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