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Java

Posted by Darren Russell
Darren Russell
39 Points

Nested loop with 4 rows and 6 columns printing 1 5 9 13 17 21 2 6 10 14 18 22 3 7 11 15 19 23 4 8 12 16 20 24

public class practice { public static void main (String[] args){ int row =4; int column = 6;

printGrid(row,column);
}   
private static void printGrid(int row, int column) {
    for( int i = 1; i <= row;i++){
        System.out.print(i);
    for(int j = 1; j <= column; j++){
        System.out.print(?);
        }
        System.out.println( );
    }
}

} I need help finding the right equation

2 Answers

Jeremiah Montano
Jeremiah Montano
7,221 Points
Jeremiah Montano
Jeremiah Montano
7,221 Points

Here is what I did:

public class forLoop {
  public static void main(String[] args) {

  int row = 4;
   int column = 6;
   int number = 0;

  for (int i = 1; i <= row; i++){
 for (int j = 1; j <= column; j++) {
 number = i + (j*row) - row;
   if(number >= 10) {
   System.out.print(number + "  "); 
   }
   else {
     System.out.print(number + "   ");
   }

 }
 System.out.println("");
 }
}

}
Ralph Findling
Ralph Findling
5,270 Points
Ralph Findling
Ralph Findling
5,270 Points

This is my solution:

public static void main(String[] args) { int maxRow = 4; int maxColumn = 6; int number = 0;

    for (int row = 1; row <= maxRow; row++){
        for (int column = 1; column <= maxColumn; column++) {
            number = row + 4*(column-1);
            System.out.printf("%d   ", number);
        }

        System.out.println("");
    }
}

the output is:

1 5 9 13 17 21
2 6 10 14 18 22
3 7 11 15 19 23
4 8 12 16 20 24

Each successive column is 4 more than the last. Since it's a nested for loop, you would increase the column for each row. The first number needs to be 1, so I subtract one from the column count. Hope that helps.