// C++ program to print number pattern 
// without re assigning using for loop
#include <iostream>
using namespace std;

int main()
{

    int rows, columns, number = 1, n = 5;
  
    // first for loop is used to identify number of rows
    for (rows = 0; rows <= n; rows++) {
      
        // second for loop is used to identify number of
        // columns and here the values will be changed
        // according to the first for loop
        for (columns = 0; columns < rows; columns++) {
          
            // printing number pattern based on the number
            // of columns
            cout << number << " ";
          
            // incrementing number at each column to print
            // the next number
            number++;
        }
      
        // print the next line for each row
        cout << "\n";
    }
    return 0;
}

// C++ program to print number without 
// reassigning patterns using while loop
#include <iostream>
using namespace std;

int main()
{
    int rows = 1, columns = 0, n = 5;
  
    // 1 value is assigned to the number
    // helpful to print the number pattern
    int number = 1;
  
    // while loops check the condition and repeat
    // the loop until the condition is false
    while (rows <= n) {
      
        while (columns <= rows - 1) {
          
            // printing number to get required pattern
            cout << number << " ";
          
            // incrementing columns value
            columns++;
          
            // incrementing number value to print the next
            // number
            number++;
        }
        columns = 0;
      
        // incrementing rows value
        rows++;
        cout << endl;
    }
    return 0;
}