Fall 2012, The College of Saint Rose

PerfectSquares BlueJ Project

PerfectSquares Source Code

The Java source code for PerfectSquares is below. Click on a file name to download it.

### PerfectSquares.java

```/*
* Example PerfectSquares: a program to demonstrate basic while loops
* by printing all perfect squares up to a given limit.
*
* Jim Teresco, The College of Saint Rose, CSC 202, Fall 2012
*
* \$Id: PerfectSquares.java 1931 2012-10-02 15:00:07Z terescoj \$
*/

import java.util.Scanner;

public class PerfectSquares {

public static void main(String[] args) {

// keyboard input here
Scanner kbd = new Scanner(System.in);

// let's get our upper limit
System.out.print("What is the upper limit on perfect squares? ");
int limit = kbd.nextInt();

// compute the first
int nextNumber = 1;
int square = nextNumber * nextNumber;

// now print them out as long as the square does not exceed the limit
while (square <= limit) {

System.out.println(nextNumber + " squared is " + square);

// now we move on to the next number to square -- this is a
// shorthand notation for
// nextNumber = nextNumber + 1;
nextNumber++;

// compute the new square
square = nextNumber * nextNumber;

// and at the end of the body of the while loop, Java will
// return back to the top and re-test the condition to see
// if we need to go around again.
}

// if we got here, the loop is over.  We'll print a message so we can
// see this.
System.out.println("No further perfect squares that do not exceed " + limit);
}
}
```