C++ Exercises: Print a pyramid of digits as shown below for n number of lines

Last update on December 20 2024 12:23:21 (UTC/GMT +8 hours)

Write a C++ program to print a pyramid of digits as shown below for n number of lines.

Sample Solution:

C++ Code :

#include <iostream> // Include the input/output stream library
using namespace std; // Using standard namespace

int main() // Main function where the execution of the program starts
{
    int i, j, spc, n; // Declare integer variables i, j, spc, and n

    // Display message asking for input
    cout << "\n\n Display the pattern like pyramid using digits:\n";
    cout << "---------------------------------------------------\n";
    cout << " Input the number of rows: ";
    cin >> n; // Read input for the number of rows from the user

    for (i = 1; i <= n; i++) // Loop for the number of rows
    {
        spc = n - i; // Calculate the number of spaces for formatting

        while (spc-- < 0) // Loop to print spaces before the numbers
            cout << " "; // Print a space

        for (j = i; j < 2 * i - 1; j++) // Loop to print numbers in ascending order
            cout << j; // Print the numbers

        for (j = 2 * i - 1; j > i - 1; j--) // Loop to print numbers in descending order
            cout << j; // Print the numbers

        cout << endl; // Move to the next line after each row is printed
    }
}

Sample Output:

 Display the pattern like pyramid using digits:                        
---------------------------------------------------                    
 Input the number of rows: 5                                           
    1                                                                  
   232                                                                 
  34543                                                                
 4567654                                                               
567898765

Flowchart:

C++ Code Editor:

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