C++ Exercises: Find Pronic Number between 1 to 1000

Last update on April 12 2025 13:00:40 (UTC/GMT +8 hours)

23. Find Pronic Numbers Between 1 and 1000

Write a program in C++ to find Pronic numbers between 1 and 1000.

Sample Solution:

C++ Code :

#include<bits/stdc++.h> // Include necessary libraries
using namespace std; // Use the standard namespace
int main()
{
    int prno, i, n, flg; // Declare variables

    cout << "\n\n Find the Pronic Numbers between 1 to 1000: \n"; // Display a message
    cout << " -----------------------------------------------\n";
    cout << " The Pronic numbers are: " << endl; // Display a message

    // Loop through numbers from 1 to 1000 to find Pronic Numbers
    for (prno = 1; prno <= 1000; prno++)
    {
        flg = 0; // Initialize flag to 0

        // Loop to check if the current number is a Pronic Number
        for (i = 1; i <= prno; i++)
        {
            if (i * (i + 1) == prno) // Check if the number is a product of consecutive integers
            {
                flg = 1; // Set flag to 1 if it is a Pronic Number
                break; // Exit the loop if a Pronic Number is found
            }
        }

        // Check if the flag is set, indicating that the number is a Pronic Number
        if (flg == 1)
        {
            cout << prno << " "; // Display the Pronic Number
        }
    }

    cout << endl; // Move to the next line after printing all Pronic Numbers
}

Sample Output:

 Find the Pronic Numbers between 1 to 1000:                                                          
 -----------------------------------------------                                                     
 The Pronic numbers are:                                                                             
2 6 12 20 30 42 56 72 90 110 132 156 182 210 240 272 306 342 380 420 462 506 552 600 650 702 756 812 
870 930 992

Flowchart:

For more Practice: Solve these Related Problems:

Write a C++ program to list all pronic numbers in a range by computing products of consecutive integers.
Write a C++ program to generate pronic numbers between 1 and 1000 using a for-loop with optimized calculations.
Write a C++ program to display pronic numbers by precomputing and storing results in a vector.
Write a C++ program to find pronic numbers within a range with error-checking for input validity.

C++ Code Editor:

Contribute your code and comments through Disqus.

Previous: Write a program in C++ to check whether a number is a Pronic Number or Heteromecic Number or not.
Next: Write a program in C++ to check if a number is Authomorphic or not.