Thread: How to string a decimal number in Java?

So I want to string the number 3.1415 and use the substring to extract each part. So the output looks like this:

3.1
3.14
3.141
3.1415
3.141
3.14
3.1

import java.util.*;
 
public class Program31415 
{
    static Scanner console = new Scanner(System.in);
 
    public static void main(String[] args)
    {
        String number;
 
        number = 3.1415;
 
        while (number == 3.1415) 
        {
 
            System.out.println(number.substring(0,2));
            System.out.println(number.substring(0,3));
            System.out.println(number.substring(0,4));
            System.out.println(number.substring(0,5));
            System.out.println(number.substring(0,4));
            System.out.println(number.substring(0,3));
            System.out.println(number.substring(0,2));                                  
 
         }    
 
    }
}

Integer.toString(3.1415)

you can use this for pi if you want more acuracy

Math.PI

Regards,
Chris

How do I get the program to stop after running after output the results once. What would I add?

import java.util.*;
 
public class Program31415 
{
    static Scanner console = new Scanner(System.in);
 
    public static void main(String[] args)
    {
        int number = 0;
        String strNumber;
 
        strNumber = Double.toString(3.1415);
 
 
        while (number == 0) 
        {
 
            System.out.println(strNumber.substring(0,2));
            System.out.println(strNumber.substring(0,3));
            System.out.println(strNumber.substring(0,4));
            System.out.println(strNumber.substring(0,5));
            System.out.println(strNumber.substring(0,4));
            System.out.println(strNumber.substring(0,3));
            System.out.println(strNumber.substring(0,2));
 
         }    
 
    }
}

get rid of the while loop altogether xD

There has to be a way to end it in the loop

you dont need the loop at all....