Question

Could you modify the code make output arranged into 5x5, like this:

1 2 3 4 5

6 7 8 9 10

11 12 13 14 15

16 17 18 19 20

21 22 23 24 25

The code is:

import java.util.*;

public class RandomGen {

public static void main(String[] args) {
int[][] ArrayRand = new int [5][5];
Random rand = new Random();
int sum = 0;
System.out.println("The generated random matris is: ");
  
for(int i = 0; i < ArrayRand.length;i++){
for(int j = 0; j < ArrayRand[i].length;j++){
ArrayRand[i][j] = rand.nextInt(100)+1;
System.out.print(" "+ ArrayRand[i][j]);
sum += ArrayRand[i][j];
}
}
System.out.println("\nThe sum is: "+ sum);
System.out.println();
}
  
}

Answer 1

We just have to add a System.out.println() statement after it finishes printing a row outside the inner for loop

import java.util.*;

public class RandomGen {

public static void main(String[] args) {
int[][] ArrayRand = new int [5][5];
Random rand = new Random();
int sum = 0;
System.out.println("The generated random matris is: ");

for(int i = 0; i < ArrayRand.length;i++){
for(int j = 0; j < ArrayRand[i].length;j++){
ArrayRand[i][j] = rand.nextInt(100)+1;;
System.out.print(ArrayRand[i][j]+" ");
sum += ArrayRand[i][j];
}
System.out.println();//add a new line before next row
}
System.out.println("\nThe sum is: "+ sum);
System.out.println();
}
  
}

The output is

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