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