// To print a horizontal row of 50 asterisks:
(note various ways of accomplishing the same task)

int number = 0;

while (number < 50)

{

     System.out.print( "*");

     number++;

}

System.out.println("\n Here are " + number +" stars");

-----------------
int number = 1;

while (number <= 50)

{

     System.out.print( "*");

      number++;

}

System.out.println("\nHere are " + number+ "stars");

To print the numbers 4 - 14 on a single line:

int num = 4;

while (num < 15)

{

     System.out.print( (num++) + " ");

}

int num = 4;

while (num <=14)

{

     System.out.print(( num++) + " ");

}

Program quits when a -1 is entered:

(using a specified number (called a SENTINEL) to terminate a situation)

(Notice the use of TWO keyboard retrieval statements to "prime" the while loop.)

int count = 0;

int grade;

grade=Console.readInt("Please enter grade ( enter -1 to quit)"); 
while (grade != -1)

{

     count++;

     System.out.println("Grade # "  + count  + " is " +  grade);
     grade=Console.readInt("Please enter grade ( enter -1 to quit) ");

}