C++ Code Example: floyd’s triangle

Basically, Floyd’s triangle is an arrangement of natural numbers from left to right in a right triangle. The first line contains a 1, the second line contains 2 and 3. The next line contains 4, 5 and 6. The numbers continue infinitely in this pattern.

#include <iostream>
using namespace std;

int main() {
    int i, j, n, k = 1;

    cout << "Enter number of rows of floyd`s trangle: ";
    cin >> n;
    
    for (i = 1; i <= n; i++) {
        for (j = 1; j <= i; j++) {
            cout << k << " ";
            k++;
        }
        cout << endl;
    }

    return 0;
}
Output
Enter number of rows of floyd`s trangle: 10
1 
2 3 
4 5 6 
7 8 9 10 
11 12 13 14 15 
16 17 18 19 20 21 
22 23 24 25 26 27 28 
29 30 31 32 33 34 35 36 
37 38 39 40 41 42 43 44 45 
46 47 48 49 50 51 52 53 54 55