How can I generate matrix with one loop?

Hello, I need to generate this matrix without many loops:

[1 2 3; 1 2 4; 1 2 5; 1 2 6; 1 3 4; 1 3 5; 1 3 6; 1 4 5; 1 4 6; 1 5 6; 2 3 4; 2 3 5; 2 3 6; 2 4 5; 2 4 6; 2 5 6; 3 4 5;

3 4 6; 3 5 6; 4 5 6];

I need simple way that can generate this matrix without many for loops

Answer 1

[Geoff Hayes]

Hind - try using nchoosek.

[Hind Thanoon]

Thank you very much. Its work.