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  1. #1
    noobie_nate is offline Member
    Join Date
    Jun 2013
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    Default getting out of a for loop

    Hello all, I'm trying to write a program that checks to see whether number input is a prime number. I got the code to work, but I want the program to keep asking the user to enter a new number until they enter a prime number.

    Java Code:
    import java.util.Scanner;
    import static java.lang.System.*;
    public class primeChallenge {
    	public static void main(String args[]) {
    		Scanner scanner = new Scanner(;
    		out.print("Enter your prime number: ");
    		int num1 = scanner.nextInt();
    		int prime;
    		for(prime = 2; prime <= num1; prime++) {
    			int num2 = num1 % prime;	
    			if(prime == num1) {
    				out.println("Input is a prime number");
    		if(num2 == 0) {
    			out.println("Input is not a prime number");
    Last edited by JosAH; 06-10-2013 at 09:09 AM. Reason: added [code] ... [/code] tags

  2. #2
    jim829 is offline Senior Member
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    Jan 2013
    Northern Virginia, United States
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    Default Re: getting out of a for loop

    Check out the using the break statement with labels. Branching Statements (The Java™ Tutorials > Learning the Java Language > Language Basics)

    The JavaTM Tutorials | SSCCE | Java Naming Conventions
    Poor planning on your part does not constitute an emergency on my part

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