Question

Write a program to generate a triangle or an inverted triangle till n terms based upon the user's choice. 

Example 1:	Example 2:
Input: Type 1 for a triangle and Type 2 for an inverted triangle Enter your choice 1 Enter the number of terms 5	Input: Type 1 for a triangle and Type 2 for an inverted triangle Enter your choice 2 Enter the number of terms 6
Sample Output: 1 2     2 3     3     3 4     4     4     4    5     5     5     5     5	Sample Output: 6     6     6     6     6     6 5     5     5     5     5     4     4     4     4     3     3     3 2     2    1

Answer 1

import java.util.*;
public class Q10
{ public static void main(String az[])
{int n, i, j, x;
Scanner sn = new Scanner(System.in);
System.out.printin("*****MENU****");
System.out.println("1. Pattern - Triangle ");
System.out.println("2. Pattern - Inverted Triangle ");
System.out.printIn("Enter your choice 1 (or) 2");
x = sn.nextInt();
switch(x)
{
case 1: System.out.printIn("Enter the number of terms");
        n = sn.nextInt();
        for (i = 1; i <= n; i++)
{ System.out.println();
        for (j = 1; j <= i; j++)
System.out.print(i);
        }
        break;

case 2: System.out.printIn("Enter the number of terms");
        n = sn.nextInt();
        for (i = n: i >= 1; i--)
{ System.out.println();
        for (j = i; j >= 1; j--)
System.out.print(i);
        }
        break;

default: System.out.println("Invalid Entry");
}
}}