Right-Aligned Alphabet Pyramid in C++

Beginner
⏱️ 7 min read
📚 Updated: Aug 2025
🎯 2 Code Examples
Nested Loops
Right-aligned alphabet pyramid A, A B, A B C, A B C D, A B C D E in C++

What You’ll Learn

We use a simple trick: print a shrinking number of leading spaces, then print letters starting from A up to the current row letter.

Because letters use setw(2), use a monospace font if you want the right edge to look perfect.

⭐ Pattern Output

Output for 5 rows:

Output
    A
   A B
  A B C
 A B C D
A B C D E
1

C++ Program (Reference Logic)

Fixed range A.. E, with one-space padding and setw(2) letters.

C++
#include <iostream>
#include <iomanip>
using namespace std;

int main() {
    int i, j, k;
    for (i = 65; i <= 69; i++) {
        for (j = 69; j > i; j--)
            cout << " ";
        for (k = 65; k <= i; k++)
            cout << setw(2) << char(k);
        cout << "\n";
    }
    return 0;
}

🧠 How It Works

1

Outer i

Sets the last letter for the current row: A through E.

Row
2

Padding loop

Print one space while j > i. That is 'E' - i spaces, shrinking by 1 each row.

Space
3

Letter loop

Print A.. i using setw(2) so the sample spacing matches.

A..i
4

Constant visual width

Padding shrinks as the letter run grows, so the right margin stays aligned. Combined with <iomanip> width-two letters, the ramp stays readable on narrow viewports.

Align
=

Example row

At i = 'C', two padding spaces then three setw(2) letters. Five rows × O(n) inner work → O(n²) for n letters.

2

Variation — User Input

Let the user choose the number of rows. We compute endChar as 'A' + rows - 1 and reuse the same loop structure.

C++
#include <iostream>
#include <iomanip>
using namespace std;

int main() {
    int rows;
    cout << "Enter the number of rows: ";
    cin >> rows;

    char startChar = 'A';
    char endChar = char('A' + rows - 1);

    for (char i = startChar; i <= endChar; ++i) {
        for (char j = endChar; j > i; --j) cout << ' ';
        for (char k = startChar; k <= i; ++k) cout << setw(2) << k;
        cout << "\n";
    }

    return 0;
}

💡 Tips for Enhancement

Try These

  • Left-align the pattern by removing the padding loop
  • Use setw(3) and adjust padding if you want wider columns
  • Validate rows to keep output within A.. Z

Avoid

  • Expecting alignment in a proportional font
  • Mixing double-space padding with setw(2) without checking spacing

Key Takeaways

1

Padding count per row is endChar - i spaces.

2

Letters per row is i - startChar + 1.

3

setw(2) matches the spaced sample output.

4

O(n²) work for n rows.

❓ Frequently Asked Questions

When j == i, we want to stop padding and begin printing letters, so the condition is strictly j > i.
Yes—character literals are clearer and compile to the same integer values. The variation example shows the char-literal style.
O(n²) for n rows.

Explore More C++ Alphabet Patterns!

Once you understand padding and loop bounds, you can build many aligned triangles and pyramids.

All Alphabet Patterns →
Did you know?

Each step down removes one padding space and adds one more letter, so the right edge stays fixed when printed in a monospace font.

About the author

Mari Selvan M P
Mari Selvan M P 🔗

Developer, cloud engineer, and technical writer

  • Experience 12 years building web and cloud systems
  • Focus Full Stack Development, AWS, and Developer Education

I write practical tutorials so students and working developers can learn by doing—from databases and APIs to deployment on AWS.

AWS Certified Developer – Associate (Credly)

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