print triangle as below

[naveen chand]

1
2 2
3 3 3

[naveen chand]

print triangle of no's using controls spaces

[weaknessforcats]

Yes, I see. But what is your question, exactly?

[whodgson]

I`ll assume you meant to ask....."tell me how to......"
If in a for loop, with appropriate start and end conditions, you included

cout<<i<<endl;|| printf("%d\n",i);

you would (hopefully)print:
1
2
3
now what would you need to change to achieve your objective?