Write program by c++ to print this pattern like number triangle

Question

the out put is
1
2 3
4 5 6
7 8 9 10

Answer 1

int x=1;
for(int i=1;i<=n;i++) //no. Of steps
{
for(int j=1;j<=i;j++)
cout<<x++;
cout<<endl;
}

Answer 2

thanks for answering