Thread: string length problem

Hello, I tried to get the program to tell me when I entered more or less than 11 digits, but even if I made sure to enter exactly 11, it still said " number must be 11 digits long. " What am I doing wrong?

import java.util.Scanner;
 
public class temp {
	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		System.out.println("enter a number");
		String number = scanner.nextLine();
		int numberlength = number.length();
		while (numberlength != 11) {
			System.out.println("the number must be 11 digits long");
			number = scanner.nextLine();
		}
		System.out.println("done.");
	}
}

Your program have an infinite loop, check your loop body. What counts the loop.

Originally Posted by ma5sacre

but even if I made sure to enter exactly 11, it still said " number must be 11 digits long. " What am I doing wrong?

Simply that when you are into the loop, the numberlength variable is not updated.

Please check for the above advise provided. If you still have issues then please can you post your input, output and error(if received) for this program.

What am I doing wrong?

Try debugging the code by printing out the value of numberlength after it is assigned a value so you can see what the computer sees. Seeing the output should help you find what you are doing wrong.