CONTROL STRUCTURES II: REPETITION - Java Programming: From Problem Analysis to Program Design - page 256

public static void main(String[] args)
{

int limit; //store the number of items

//in the list

int number; //variable to store the number

int sum; //variable to store the sum

int counter; //loop control variable

System.out.print("Line 1: Enter the number of "
+ "integers in the list: "); //Line 1

limit = console.nextInt(); //Line 2

System.out.println(); //Line 3

sum = 0; //Line 4

counter = 0; //Line 5

System.out.println("Line 6: Enter " + limit
+ " integers."); //Line 6

while (counter < limit) //Line 7

{

number = console.nextInt(); //Line 8

sum = sum + number; //Line 9

counter++; //Line 10

}

System.out.printf("Line 11: The sum of the %d " +
"numbers = %d%n", limit, sum); //Line 11

if (counter != 0) //Line 12
System.out.printf("Line 13: The average = %d%n",
(sum / counter)); //Line 13

else //Line 14

System.out.println("Line 15: No input."); //Line 15

}

}
Sample Run: (In this sample run, the user input is shaded).
Line 1: Enter the number of integers in the list: 12

Line 6: Enter 12 integers.
8 9 2 3 90 38 56 8 23 89 7 2
Line 11: The sum of the 12 numbers = 335
Line 13: The average = 27
The preceding program works as follows: The statement in Line 1 prompts the user to
input the data for processing. The statement in Line 2 reads the next input and stores it in
the variable limit . The value of limit indicates the number of items to be read. The
statements in Lines 4 and 5 initialize the variables sum and counter to 0 . The while
statement in Line 7 checks the value of counter to determine how many items have
been read. If counter is less than limit , the while loop proceeds for the next iteration.