C++ program to print Floyd’s Triangle (2 Ways)

In this program, we will learn how to print Floyd’s Triangle using the C++ programming language.

What is Floyd’s Triangle?

We discuss two ways to write code for it.

• Using Loop
• Using Recursion

C++ programming code to print Floyd’s Triangle

Using Loop

In this program, we will use nested for loop.

Code:-

#include <iostream>

using namespace std;
 
int main(){
    int rows, num = 1;

    cout << "Enter the number of rows of Floyd's triangle to print: ";
    cin >> rows ;


    for (int i = 1; i <= rows; i++){
        for (int j = 1; j <= i; j++){
            cout << num << " ";
            num++;
        }
    cout << endl;
    }

    return 0;
}

Output:-

Using Recursion

In this program, we will use the recursive function printFloydTriangle(), which will print the Floyd Triangle in the output.

Code:-

#include <iostream>

using namespace std;

void printFloydTriangle(int rows){
   static int col = 1, num = 1;
   
   if (rows <= 0)
        return;
 
   for(int i = 1; i <= col; ++i)
        cout << num++ << " ";
     
   cout << endl;
   col++;
   
   printFloydTriangle(--rows);  
}

int main(){
    int rows, num = 1;

    cout << "Enter the number of rows of Floyd's triangle to print: ";
    cin >> rows ;

    printFloydTriangle(rows);

    return 0;
}

Output:-

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