C# Logical Patterns: Pyramid and Number Patterns with For Loops

 Patterns are an exciting and practical way to master loops in programming. Using for loops in C#, you can create various logical patterns that visually represent numbers, stars, or shapes. In this article, we’ll explore some commonly used pyramid and number patterns with explanations and examples.

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Why Practice Pattern Programming?

1. Enhances loop logic skills.
2. Improves understanding of nested loops.
3. Provides a foundation for complex problem-solving.
4. You may practice c# logics with previous articles (javascript)

Let’s dive into C# logical patterns with step-by-step code and explanations.

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1. Half-Pyramid Pattern with Stars (*)

Explanation

A half-pyramid consists of rows with increasing numbers of stars. Each row contains as many stars as its row number.

Pattern

*
**
***
****
*****

Code Example

using System;

class HalfPyramid
{
    static void Main()
    {
        int rows = 5;
        for (int i = 1; i <= rows; i++)
        {
            for (int j = 1; j <= i; j++)
            {
                Console.Write("*");
            }
            Console.WriteLine(); // Move to the next line
        }
    }
}

Explanation

• Outer loop (i) handles the number of rows.
• Inner loop (j) prints the stars for the current row.

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2. Inverted Half-Pyramid Pattern with Stars (*)

Explanation

This pattern starts with a full row of stars and decreases with each subsequent row.

Pattern

*****
****
***
**
*

Code Example

using System;

class InvertedHalfPyramid
{
    static void Main()
    {
        int rows = 5;
        for (int i = rows; i >= 1; i--)
        {
            for (int j = 1; j <= i; j++)
            {
                Console.Write("*");
            }
            Console.WriteLine(); // Move to the next line
        }
    }
}

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3. Full Pyramid Pattern with Stars (*)

Explanation

A full pyramid pattern is symmetric and consists of stars centered in a triangle shape.

Pattern

    *
   ***
  *****
 *******
*********

Code Example

using System;

class FullPyramid
{
    static void Main()
    {
        int rows = 5;
        for (int i = 1; i <= rows; i++)
        {
            // Print spaces
            for (int j = 1; j <= rows - i; j++)
            {
                Console.Write(" ");
            }
            // Print stars
            for (int k = 1; k <= (2 * i - 1); k++)
            {
                Console.Write("*");
            }
            Console.WriteLine(); // Move to the next line
        }
    }
}

Explanation

• First inner loop prints spaces for alignment.
• Second inner loop prints stars to form the pyramid.

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4. Number Pyramid

Explanation

A number pyramid replaces stars with numbers, often repeating the row number.

Pattern

    1
   222
  33333
 4444444
555555555

Code Example

using System;

class NumberPyramid
{
    static void Main()
    {
        int rows = 5;
        for (int i = 1; i <= rows; i++)
        {
            // Print spaces
            for (int j = 1; j <= rows - i; j++)
            {
                Console.Write(" ");
            }
            // Print numbers
            for (int k = 1; k <= (2 * i - 1); k++)
            {
                Console.Write(i);
            }
            Console.WriteLine(); // Move to the next line
        }
    }
}

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5. Diamond Pattern with Stars (*)

Explanation

The diamond pattern consists of a full pyramid followed by an inverted pyramid.

Pattern

    *
   ***
  *****
 *******
*********
 *******
  *****
   ***
    *

Code Example

using System;

class DiamondPattern
{
    static void Main()
    {
        int rows = 5;

        // Upper part of diamond
        for (int i = 1; i <= rows; i++)
        {
            for (int j = 1; j <= rows - i; j++)
            {
                Console.Write(" ");
            }
            for (int k = 1; k <= (2 * i - 1); k++)
            {
                Console.Write("*");
            }
            Console.WriteLine();
        }

        // Lower part of diamond
        for (int i = rows - 1; i >= 1; i--)
        {
            for (int j = 1; j <= rows - i; j++)
            {
                Console.Write(" ");
            }
            for (int k = 1; k <= (2 * i - 1); k++)
            {
                Console.Write("*");
            }
            Console.WriteLine();
        }
    }
}

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6. Number Triangle

Explanation

A number triangle increases the count of numbers in each row.

Pattern

1
12
123
1234
12345

Code Example

using System;

class NumberTriangle
{
    static void Main()
    {
        int rows = 5;
        for (int i = 1; i <= rows; i++)
        {
            for (int j = 1; j <= i; j++)
            {
                Console.Write(j);
            }
            Console.WriteLine();
        }
    }
}

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7. Pascal’s Triangle

Explanation

Pascal's Triangle consists of binomial coefficients arranged in a triangular format.

Pattern

    1
   1 1
  1 2 1
 1 3 3 1
1 4 6 4 1

Code Example

using System;

class PascalsTriangle
{
    static void Main()
    {
        int rows = 5;

        for (int i = 0; i < rows; i++)
        {
            int number = 1;

            // Print spaces
            for (int j = 1; j <= rows - i; j++)
            {
                Console.Write(" ");
            }

            // Print numbers
            for (int k = 0; k <= i; k++)
            {
                Console.Write(number + " ");
                number = number * (i - k) / (k + 1);
            }
            Console.WriteLine();
        }
    }
}

Conclusion

Practicing patterns like pyramids and triangles strengthens your understanding of nested loops in C#. Start with simple patterns like half pyramids and progress to advanced ones like Pascal's Triangle or Diamonds. These patterns are not just academic exercises—they’re also helpful in solving complex programming problems.

For more coding tutorials, visit AJ Tech Blog to explore articles on C# Basics, Operators, and OOP Concepts.