Descending Start Number Pattern in C++

Beginner
⏱️ 5 min read
📚 Updated: Aug 2025
🎯 2 Code Examples
Nested Loops
Descending start number pattern output (5 5 5 5 5; 4 5 5 5 5; 3 4 5 5 5; 2 3 4 5 5; 1 2 3 4 5) in C++ programming

What You’ll Learn

How to print a pattern where each row starts lower and moves up to 5, then fills the rest with 5:

5 5 5 5 5, 4 5 5 5 5, 3 4 5 5 5, 2 3 4 5 5, 1 2 3 4 5

This is a good exercise for combining multiple inner loops to control a fixed row width.

⭐ Pattern Output

For a maximum value of 5, the pattern looks like this:

Output
5 5 5 5 5
4 5 5 5 5
3 4 5 5 5
2 3 4 5 5
1 2 3 4 5
1

Complete C++ Program

First print i..5, then print enough 5s to keep each row at 5 numbers.

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

int main() {
    int maxVal = 5;
    int i, j;

    for (i = maxVal; i >= 1; i--) {
        for (j = i; j <= maxVal; j++) {
            cout << j << " ";
        }
        for (j = 1; j < i; j++) {
            cout << maxVal << " ";
        }
        cout << "\n";
    }

    return 0;
}

🧠 How It Works

1

Set the maximum value

int maxVal = 5; controls the row width and the final number printed in each row.

Setup
2

Outer loop (choose starting number)

for (i = maxVal; i >= 1; i--) sets the start of each row: 5, 4, 3, 2, 1.

Row control
3

Print the ascending part

for (j = i; j <= maxVal; j++) prints i, i+1, ... up to 5.

Number printing
4

Fill remaining positions with 5

for (j = 1; j < i; j++) prints extra 5s so each row has exactly 5 numbers.

Padding
=

Fixed-width number pattern

Each row is built from two parts: an ascending segment and a padding segment of 5s.

2

Variation — User Input Version

Let the user choose the maximum value (the row width). For best results, use a positive integer.

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

int main() {
    int maxVal;
    int i, j;

    cout << "Enter the maximum value: ";
    cin >> maxVal;

    if (!cin || maxVal <= 0) return 0;

    for (i = maxVal; i >= 1; i--) {
        for (j = i; j <= maxVal; j++) {
            cout << j << " ";
        }
        for (j = 1; j < i; j++) {
            cout << maxVal << " ";
        }
        cout << "\n";
    }

    return 0;
}

💡 Tips for Enhancement

Try These

  • Remove trailing spaces by printing a space only between numbers
  • Print a different padding value instead of always printing maxVal
  • Right-align the rows by printing leading spaces before each line
  • Convert the logic into a reusable function for other patterns
  • Use setw for aligned output when numbers have multiple digits

Avoid

  • Using endl inside loops (unnecessary flushing)
  • Forgetting the second inner loop (row widths won’t match)
  • Using non-positive values without validation
  • Mixing row and column responsibilities between loops

Key Takeaways

1

The outer loop controls the starting number in each row.

2

The first inner loop prints from i up to maxVal.

3

The second inner loop fills the remaining positions with maxVal.

4

This keeps every row the same width, which is common in matrix-like patterns.

❓ Frequently Asked Questions

Because the program prints up to maxVal and then pads with maxVal until the row reaches the same width.
Yes. Change maxVal to a larger number or read it from user input.
Padding with 5 keeps the last value fixed in every row, creating a consistent right edge of 5s.
It grows roughly quadratically with the maximum width, so it is typically described as O(n²).

Explore More C++ Number Patterns!

Fixed-width patterns are great practice for nested loops and padding logic.

All Number Patterns →
Did you know?

Many pattern problems use a second loop just to print padding (spaces or repeated numbers) so every row has the same width.

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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