创建2D数组并将每个元素初始化为i * j的值，其中i和j是2个索引（例如，元素[5] [3]为5 * 3 = 15）

Question

I am truly stuck here on how to do this. I got as far as creating the 10x10 array and making variables i and j - not far at all. I thought about the use of loops to initialize every element, but I just don't know how to go about doing it. Any help is appreciated, thanks.

public class arrays {

public static void main(String[] args) {

    int[][] array = new int[10][10];
    int i = 0, j = 0;   
}

}

I was thinking of using a do while loop or for loop.

Answer 1

Create two nested for loops, one for i , and one for j , looping over all valid indices. In the body of the inner for loop, assign the computed product to the 2D array element.

Answer 2

Psuedo-code:

for i = 0 to 9
   for j = 0 to 9
       array[i][j] = i*j

Converting this to Java should be a snap.

Answer 3

You will need two for loops inside each other:

int[][] array = new int[10][10];
for (int x = 0; x < array.length; ++x)
{
   for (int y = 0; y < array[y].length; ++y)
   {
       int product = x * y;
       // put the value at the right place
   }
}

You can read this as:

For each x value, iterate over the ten y values and do...

Answer 4

 int [][] array = new int[10][10];
 for (int i = 0; i < 10; i++) {
       for (int j = 0; j < 10; j++) {
             //initialize every element
             array[i][j] = i + j; 
           }
     }