PROGRAM TO PRINT GET FOLLOWING OUTPUT..

1
1 2
1 2 3
1 2 3 4
1 2 3 4 5

INPUT--

#include <iostream>

using namespace std;

int main()

{

    int i,j,rows;

    cout<<"Enter the number of rows: ";

    cin>>rows;

    for(i=1;i<=rows;++i)

    {

        for(j=1;j<=i;++j)

        {

           cout<<j<<" ";

        }

        cout<<"\n";

    }

    return 0;

}

OUTPUT--

Enter the number of rows:

1

1 2

1 2 3

1 2 3 4

1 2 3 4 5