Define a class (using the Scanner class) to generate a pattern of a word in the form of a triangle or in the form of an inverted triangle, depending upon user's choice.

Sample Input:

Enter a word: CLASS

Enter your choice: 1

Sample Output:

CLA

CLAS

CLASS

Enter your choice: 2

Sample Output:

CLASS

CLAS

CLA

Java Program – Word Triangle / Inverted Triangle

Java

import java.util.Scanner;
 
public class WordPattern
{
    public static void main(String[] args)
    {
        Scanner sc = new Scanner(System.in);
 
        System.out.print("Enter a word: ");
        String word = sc.next();
 
        System.out.print("Enter your choice (1 for Triangle, 2 for Inverted Triangle): ");
        int choice = sc.nextInt();
 
        int length = word.length();
 
        if(choice == 1)
        {
            // Triangle Pattern
            for(int i = 1; i <= length; i++)
            {
                System.out.println(word.substring(0, i));
            }
        }
        else if(choice == 2)
        {
            // Inverted Triangle Pattern
            for(int i = length; i >= 1; i--)
            {
                System.out.println(word.substring(0, i));
            }
        }
        else
        {
            System.out.println("Invalid Choice!");
        }
 
        sc.close();
    }
}

Output

Sample Run 1: 
 Input: 
Enter a word: CLASS
Enter your choice: 1

 Output : 
C
CL
CLA
CLAS
CLASS

Sample Run 2: 
 Input: 
Enter a word: CLASS
Enter your choice: 2

 Output : 
CLASS
CLAS
CLA
CL
C