lesson 1 Easy Java Program , Input using Scanner , and output statement, Complete and Detailed Explanation Per Line

package firstprograms;

import java.io.*;   // library required for scanner input output functions

import java.util.Scanner;  // library required for scanner input reader

public class InputOutput {

   

    public static void main(String args [])

            {   

                // list of variables

                String name ;  // String type stores text , characters and numbers

                int age;       // int store whole numbers

                Scanner in = new Scanner(System.in).useDelimiter("\n");  // Scanner input reader method  , useDelimeter means it will read input until next line

              

                // input name

                 System.out.print("Enter your name :");

                 //read users input and store to variable

                 name=in.nextLine(); //nextLine() read and store String input

                

                //input name

                System.out.print("Enter your age :");    //print means to display the next statement on the same line

                 //read users input and store to variable

                 age=in.nextInt(); // nextInt(); read and store Integer

                

                 //Display the result

                

                 System.out.println( "Welcome " +name);  // println means to display the next statement of the next line

                 System.out.println("You are " +age + " years old ");                 

               

    }

  

}