while

#include <iostream>
using namespace std;
int main()
{
    int x=1;
    while (x<=9 )
    {
        for (int i=1;i<=x;i++)
        {
            cout<<x<<"*"<<i<<"="<<x*i<<" "; 
        }
        cout<<endl;
        x++;
    }
 } 

do while

#include<iostream>
using namespace std;
int main()
{
    
    int x=1; 
    do 
    {
        for (int y=1;y<=x;y++)
        {
                cout<<x<<"*"<<y<<"="<<x*y<<" "; 
        }
        cout<<endl;
        x++;
    }
    while (x<9);
    
}