Java Alphabet Pattern 32

Posted in Java Tutorial

Updated on Jan 10, 2024

By Mari Selvan

👁️ 151 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

Java Alphabet Pattern 32

Here`s a program that prints the above alphabet pattern using Java Programming:

Demo.java

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public class Demo
{
 public static void main(String[] args)
 {
  int i, j, k, m, n;
  for(i=65; i<=69; i++) 
  {
   for(j=69; j>=i; j--)
    System.out.print(" ");
   for(k=65; k<=i; k++)
    System.out.format("%c", k);
   n = k - 1;
   for(m=65; m<i; m++)
    System.out.format("%c", --n);
   System.out.println();
  }
 }
}

💻 Testing the Program

When you run the above program, it will print the following output:

Output

    A
   ABA
  ABCBA
 ABCDCBA
ABCDEDCBA

🧠 How the Program Works

Let's break down the logic behind the code:

public class Demo: This line defines a Java class named "Demo."
public static void main(String[] args): This is the main method of the program, where the execution starts. It takes an array of strings as arguments (although it doesn't use them in this program).
Inside the main method, several integer variables are declared: i, j, k, m, and n.
The outer loop (for(i=65; i<=69; i++)) iterates from the ASCII value of 'A' (65) to the ASCII value of 'E' (69). The variable i represents the current character to be printed in each row of the triangle.
Inside the outer loop, there are three nested loops:
1. The first nested loop (for(j=69; j>=i; j--)) is responsible for printing spaces before the characters. It iterates from the ASCII value of 'E' (69) down to the current value of i. This loop prints spaces to create the indentation on the left side of the triangle.
2. The second nested loop (for(k=65; k<=i; k++)) prints characters starting from 'A' (ASCII 65) up to the current value of i. This loop prints characters in ascending order, forming the left side of the triangle.
3. After the second nested loop, n is assigned the value of k - 1. This is done to prepare for the next loop, which will print characters in descending order on the right side of the triangle.
4. The third nested loop (for(m=65; m<i; m++)) prints characters in descending order starting from 'A' (ASCII 65) to the character just before the current value of i. The --n operation is used to decrement the value of n and print characters in descending order.
After the three nested loops, a System.out.println(); statement is used to move to the next line, creating a new row in the triangle.
The outer loop continues to the next value of i until it reaches the ASCII value of 'E' (69), completing the inverted right-angled triangle pattern.

💯 Tips for Enhancement:

Explore the versatility of this pattern by adjusting its parameters. Whether you increase or decrease the size, tweak the spacing, or modify the characters used, each change opens up a world of possibilities, allowing you to customize and create your unique visual effects.

✔ Conclusion:

Creating visually appealing patterns is not only a fun endeavour but also a great way to enhance your programming or design skills. We hope this tutorial has inspired you to explore the world of creative coding. Share your creations with us, and let your imagination run wild!

🤗 Closing Call-to-Action:

We'd love to see your unique interpretations of the alphabet pattern. Share your creations in the comments below, and don't hesitate to reach out if you have any questions or suggestions for future tutorials. Happy coding!