How many row and columns does this array have?

Question

int multiArr[1][3]

Answer 1

1 row. 3 columns

Answer 2

1 row and 3 columns. An example :
3 6 9 (3 elements in 1 row and 3 columns)

Answer 3

The most common interpretation would be that [1][3] means 1 row and 3 columns, and for most implementations, this will be the most direct. Consider printing:

const unsigned rows = 1,
cols = 3;
int multiArr[rows][cols] = {1, 2, 3};

for (unsigned i = 0; i < rows; i++) {
for (unsigned j = 0; j < cols; j++)
std::cout << multiArr[i][j] << ' ';
std::cout << std::endl;
}

The above prints out:
1 2 3

However, you aren't forced to interpret it this way; it could just as well mean 1 column and 3 rows. Consider the following modifications to the above:

const unsigned cols = 1,
rows = 3;
int multiArr[cols][rows] = {1, 2, 3};

for (unsigned j = 0; j < rows; j++) {
for (unsigned i = 0; i < cols; i++)
std::cout << multiArr[i][j] << ' ';
std::cout << std::endl;
}.

The above prints out:
1
2
3