A2-dimensional 3x3 array of ints, has been created and assigned to tictactoe. write an expression whose value is true if the elements of the diagonal that includes the first element of the first row are all equal.

Following are the expression of the statement.

tictactoe[0][2]

Explanation:

In the given statement, we set 2-dimensional array which index value is [3][3] that means 3 row and 3 column that is total number of elements is 9, it is integer data type 2-D array variable i.e., "tictactoe[][]".  

Finally, we write an expression of the 2-D array variable that contains the first element in the last row i.e., "tictactoe[0][2]".