/*
    This program demonstrates probably the simplest use of 2D arrays
*/
public class multtable {
    public static void main(String[] args) {
        // declare the 2D array, which will hold a multiplication table
        int[][] multtable = new int[10][10];

        // fill the array with data
        for(int i=0; i<10; i++) {           // this loop is for rows
            for(int j=0; j<10; j++) {       // this loop is for columns
                multtable[i][j] = i*j;
            }
        }

        // same loops as before, but now we just print out the arrays
        // notice that we start the loops at 1 this time, because we don't need to see
        //   a row of all zeros
        for(int i=1; i<10; i++) {
            for(int j=1; j<10; j++) {
                // this ensures that all single-digit numbers will line up into columns
                if(multtable[i][j] < 10)
                    System.out.print(" ");
                System.out.print(multtable[i][j]+" ");
            }
            // make a new line for every row
            System.out.print("\n");
        }
    }
}