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Java Exercises: Program to start with an integer n, divide n by 2 if n is even or multiply by 3 and add 1 if n is odd, repeat the process until n = 1

Java Basic: Exercise-86 with Solution

Write a Java program start with an integer n, divide n by 2 if n is even or multiply by 3 and add 1 if n is odd, repeat the process until n = 1.

Sample Solution:

Java Code:

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		int ctr = 0;
		Scanner in = new Scanner(System.in);
		int n = in.nextInt();
		while (n != 1) {
		    System.out.println(n);
			if (n % 2 == 0) {
				n = n / 2;
				ctr += 1;
			}
			else {
				n = (3 * n + 1) / 2;
				ctr += 1;
			}
		}
		System.out.println(ctr);
		in.close();
	}
}

If input 5

Sample Output: 

5
8
4
2
4

Flowchart:

Flowchart: Java exercises: Program to start with an integer n, divide n by 2 if n is even or multiply by 3 and add 1 if n is odd, repeat the process until n = 1

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Java: Tips of the Day

Parsing dates:

import java.io.*;
import java.util.*;
import java.text.*;

String s = "2001/09/23 14:39";

SimpleDateFormat formatter = new SimpleDateFormat ("yyyy/MM/dd H:mm");
Date d = formatter.parse(s, new ParsePosition(0));