C++ Exercises: Display the pattern like right angle triangle with number increased by 1

Last update on April 07 2025 12:59:33 (UTC/GMT +8 hours)

38. Right-Angle Triangle Pattern with Increasing Numbers

Write a C++ program to make such a pattern like a right angle triangle with the number increased by 1.

Visual Presentation:

Sample Solution:

C++ Code :

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

int main() // Main function where the execution of the program starts
{
    int i, j, rows, k = 1; // Declare integer variables i, j, rows, and k with k initialized to 1

    // Display message asking for input
    cout << "\n\n Display such a pattern like right angle triangle with number increased by 1:\n";
    cout << "---------------------------------------------------------------------------------\n";
    cout << " Input number of rows: ";
    cin >> rows; // Read input for the number of rows from the user

    // Loop to print the pattern with numbers increased by 1 in a right-angle triangle shape
    for (i = 1; i <= rows; i++) // Loop for the number of rows
    {
        for (j = 1; j <= i; j++) // Nested loop for printing numbers in each row
        {
            cout << k++ << " "; // Print the value of 'k' (increased by 1) and increment 'k' afterwards
        }
        cout << endl; // Move to the next line after each row is printed
    }
}

Sample Output:

 Display such a pattern like right angle triangle with number increased by 1:                                                                 
---------------------------------------------------------------------------------                                                             
 Input number of rows: 4                                               
1                                                                      
2 3                                                                    
4 5 6                                                                  
7 8 9 10

Flowchart:

For more Practice: Solve these Related Problems:

• Write a C++ program to print a right-angle triangle pattern where numbers increase sequentially across the rows.
• Write a C++ program that displays a triangle pattern such that each row starts where the previous row ended with increasing numbers.
• Write a C++ program to output a numeric triangle pattern where each row’s numbers are in continuous increasing order.
• Write a C++ program that reads an integer n and prints a triangle pattern with numbers increasing by 1 throughout the rows.

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