Javascript Nested While Loops

//CSC 15 lab 6 Nested While Loops
//lab6.java
//Christopher Smith
//

import java.util.Scanner;

public class lab6 {
   public static void main (String[] args) {
   
   Scanner kb = new Scanner(System.in); //defining keyboard scanner
   int x; //defining variables
   int row_count;
   int col_count;
   int item_count;
  
   System.out.println("Enter an integer (>0):"); //screen prompt for integer greater than zero
   x = kb.nextInt(); //input for x
  
   if (x<0) //verifying the user input for fun
   {
   System.out.println("I said greater than 0!!");
   System.out.println("Please input another value");
   x = kb.nextInt();
   }
  
   //starting code for patterns
   //uses user defined x to define the dimensions
  
//Fig 1: 1 row with x columns--------------------------------------------------------------------
  
   System.out.println("Here is x defined columns for 1 row");
   col_count = 1;
   while( col_count <= x) //while columns are less than or = to x
   {
   System.out.print("*"); //prints * for each column
   col_count++; //increments the columns
   }
System.out.println();
  
//Fig 2: A square with x defined width and height------------------------------------------------
  
   System.out.println("Here is a square with user defined height and width");
   row_count = 1;
      while( row_count <= x )       //row count starting at 1 staying under x
      {
        col_count = 1;
        while( col_count <= x  )   // columns fill the row while under x, row by row
        {
           System.out.print( "*" );
           col_count = col_count + 1;//incrementing columns
        }
        System.out.println();
        row_count = row_count + 1; //incrementing rows
      }

//Fig 3: Squares counting up to the user defined amount of width and height-------------------------------------
  
   System.out.println("Figure 3");
item_count = 1;//item count tracks number of squares and determines width and height of squares
while(item_count<=x)
{
row_count = 1;
while(row_count<=item_count)//using item count instead of x
{
col_count = 1;
while(col_count<=item_count)//using item count instead of x
{
System.out.print("*");
col_count = col_count + 1;//incrementing for loop
}
System.out.println();
row_count = row_count + 1;//incrementing
}
System.out.println();
item_count = item_count + 1;//incrementing
}

  
//Figure 4: Triangle counting down column = to row number-------------------------------------------------------------------
   System.out.println("Figure 4 triangle");
  
   row_count = 1;
   while (row_count<=x)
   {
   col_count = 1;
   while (col_count <= row_count)//if row is 2, this prints for column 1 and 2 within row
   {
   System.out.print("*");
   col_count++;//increment column
   }
   row_count++; //increment row
   System.out.println();
   }

//Figure 5: Starting at x defined and counting down to 1 triangle-----------------------------------------------------
   System.out.println("Starting figure 5");
  
   row_count = 1;
   while (row_count<=x)
   {
   col_count = x; //have to start with user defined value for x
   while (col_count >= row_count)//using row to define amount of columns
   {
   System.out.print("*");
   col_count--; //incrementing columns to fill in row
   }
   row_count++; //going down one for rows
   System.out.println();
   }
//Figure 6: Hollow square------------------------------------------------


System.out.println("Figure 6");
int a = 0, b = 0;
while (a <= x) {
if (a == 0 || a == x) //Is it top and bottom or inside of square
{
col_count = 1;
     while( col_count <= x) //while to print out the top and bottom line
     {
   System.out.print("*"); //prints * for each column
   col_count++; //increments the columns
   }
}
else //inside of square
{
b = 0;
while (b <= x)
{
if (b == 0 || b == x)
{
System.out.print("*");//prints side of square
}
else
{
System.out.print(" ");//prints blank spaces sequence
}
b++;
}
}
System.out.print("\n");
a++;
}


}
}