Square character triangle program in Java

import java.util.Scanner;
public class SquareCharacterTriangle
{
 public static void main(String[] args) {
  char ch;
  Scanner sc = new Scanner(System.in);
  System.out.print("Enter last character of triangle : ");
  ch = sc.next().charAt(0);
  if (ch >= 'a' && ch <= 'z') {
   ch = (char)(ch - 32);
  }
  System.out.println();
  for (char r = 'A'; r <= ch; r++) {
   for (char c = r; c >= 'A'; c--) {
    System.out.print(c);
   }
   System.out.println();
  }
  for (char r = 'A';
   'A' <= ch; ch--, r++) {
   for (char c = (char)(ch - 1); c >= 'A'; c--) {
    System.out.print(c);
   }
   System.out.println();
  }
 }
}

Output:

Enter last character of triangle : d

A
BA
CBA
DCBA
CBA
BA
A


BUILD SUCCESSFUL (total time: 4 seconds)

Note: Hello friends, If you have any better solution for this programs then please comment below, I will add your comment as a solution for this programs.

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Number rectangle structure program in Java

import java.util.Scanner;
public class NumberRectangle
{
 public static void main(String[] args) 
 {
  int num, r = 1;
  System.out.print("Enter loop repeat number(rows): ");
  Scanner sc = new Scanner(System.in);
  num = sc.nextInt();
  System.out.println();
  for (; num >= 1; num--, r++) {
   for (int c = 1; c <= num; c++) {
    System.out.print(c);
   }
   for (int sp = r; sp > 1; sp--) {
    System.out.print("__");
   }
   for (int c = num; c >= 1; c--) {
    System.out.print(c);
   }
   System.out.println();
  }
 }
}

Output:

Enter loop repeat number(rows): 6

123456654321
12345__54321
1234____4321
123______321
12________21
1__________1

BUILD SUCCESSFUL (total time: 5 seconds)

Note: Hello friends, If you have any better solution for this programs then please comment below, I will add your comment as a solution for this programs.

Thanks for visiting my Blog.

Java program to print alternative number-star pyramid.

package demo;
import java.util.Scanner;
public class NumberWithStar
{
 public static void main(String[] args) 
 {
  int num, z = 1, p, n;
  Scanner sc = new Scanner(System.in);
  System.out.print("Enter maximum number : ");
  //Input 5 for desire output
  num = sc.nextInt();
  for (int r = 1; r <= num; r++, z = z + 2) 
  {
   for (int c = 1; c <= z; c++) 
   {
    if (c % 2 == 0) {
     System.out.print("*");
    } else {
     System.out.print(r);
    }
   }
   System.out.println();
  }
  n = num + 3;
  p = num - 1;
  for (int r = num; r >= 1; r--, n = n - 2, p--) 
  {
   for (int c = 1; c <= n; c++) 
   {
    if (c % 2 == 0) {
     System.out.print("*");
    } else {
     System.out.print(p);
    }
   }
   System.out.println();
  }
 }
}

Output:

Enter maximum number : 5

1
2*2
3*3*3
4*4*4*4
5*5*5*5*5
4*4*4*4*
3*3*3*
2*2*
1*


BUILD SUCCESSFUL (total time: 5 seconds)

Print rectangle pattern program in Java.

package demo;
public class RectanglePattern 
{
 public static void main(String[] args) 
 {
  int num = 4, q = 6;
  for (int r = 1; r <= num; r++, q = q - 2) 
  {
   for (int c = 1; c <= r; c++) {
    System.out.print(c);
   }
   for (int p = q; p >= 1; p--) {
    System.out.print(r);
   }
   for (int c = r - 1; c >= 1; c--) {
    System.out.print(c);
   }
   System.out.println();
  }
  for (int r = 3, m = 1; r >= 1; r--, m = m + 2) 
  {
   for (int c = 1; c <= r; c++) {
    System.out.print(c);
   }
   for (int n = m; n >= 1; n--) {
    System.out.print(r);
   }
   for (int c = r; c >= 1; c--) {
    System.out.print(c);
   }
   System.out.println();
  }
 }
}

Output:
run:
1111111
1222221
1233321
1234321
1233321
1222221
1111111

BUILD SUCCESSFUL (total time: 0 seconds)