Question

• Develop an "Echo" command that returns the parameters on different lines.
Example: For input
"$ Java Echo Hello world!"
The answer will be:
"Hello
world
! ”

using java programming language

Answer 1

Every line of the code is clearly explained in the comments of the code itself.

CODE--

import java.util.*;
public class Echo
{
   public static void main(String[] args)
   {
       Scanner sc=new Scanner(System.in);
       String cmd;
      
       //read the command from the user
       cmd=sc.nextLine();
      
       //store each word in a separate array variable
       String[] words=cmd.split("[!. ?\"]");
      
       //Echo or display the given output
       System.out.print("\"");
      
       //we start from index 4 because
       //the indices before 4 contain the command
       //which is not required to be displayed
       for(int i=4;i<words.length;i++)
       {
           System.out.println(words[i]);
       }
      
       //here we check if there is any punctuation at the end
       if(cmd.charAt(cmd.length()-2)=='!' ||cmd.charAt(cmd.length()-2)=='.' ||cmd.charAt(cmd.length()-2)=='?')
       {
           //if so we display the punctuation
           System.out.println(cmd.charAt(cmd.length()-2)+"\"");
       }
       sc.close();
   }
}

Output Screenshot:

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