Nesting Loops and Ifs

19. Counting Loop for Lines

Answer:
Yes — if the user asks for five lines, a loop should count 1, 2, 3, 4, 5.

Counting Loop for Lines

Here is the skeleton program, with the usual blanks. The skeleton focuses on getting the number of lines right and leaves the rest for later.

import java.util.Scanner;
//
public class StarBlock
{
  public static void main (String[] args ) 
  {
    Scanner scan = new Scanner( System.in );
    int numRows;      // the number of Rows
    int numStars;     // the number of stars per row
    int row;          // current row number

    // collect input data from user
    System.out.print( "How many Rows? " );
    numRows = scan.nextInt() ;

    System.out.print( "How many Stars per Row? " );
    numStars = scan.nextInt() ;

    
    
    while (  )    
    {
       System.out.println( "Row " + row );  // temporary software testing
       (more statements go here )

           
    }
  }
}

Some of the information collected from the user is not used yet. First concentrate on looping the correct number of lines.

(As usual, build the program in stages and make sure each stage is correct before building on it.)

Question 19:
Fill in the three blanks. Select from the following:
row > numRows
row <= numRows
row < numRows
row  =  0;
row  =  1;
row  = row + 1;
row  = row - 1;
(Not all choices are used.)