Initial Commit

Java/IsPrimeWhile.java

@@ -0,0 +1,51 @@
+/**
+ * @date 10, 25, 2010
+ * @author ricky.barrette
+ * @author Twenty Codes, LLC
+ */
+
+import java.util.Scanner;
+
+/*
+ * this class will be used to demostrate how to use a while loop to deermine if a number is prime
+ * @author ricky.barrette
+ */
+public class IsPrimeWhile{
+	
+	/*
+	 * this is the main method of the class
+	 * @param args from command line
+	 * @author ricky.barrette
+	 */
+	public static void main(String[] args){
+
+		//prepear the variables and the scanner for input
+		Scanner scan = new Scanner(System.in);
+		int input;
+		int index = 2;
+		boolean isPrime = true;
+
+		//ask user for input and get the input
+		System.out.print("Enter a number: ");
+		input = scan.nextInt();
+
+		//while there are more test to preform...
+		while ( index < (input -1)){
+			System.out.println(input +", "+ index +", "+ (input % index));
+			//the number is not prime break the loop
+			if ( (input % index) == 0){
+				isPrime =  false;
+				break;
+			}
+			index++;
+		}
+
+		//process the input and display the results
+		if(isPrime)
+			System.out.println("The number "+input+" is prime");
+		else
+			System.out.println("The number "+input+" is not prime");
+	}
+
+} 
+//END CLASS