Tuples without self-loop

Question

I have a simple question coincerning the Mathematica function Tuple.

Currently, I apply the following code

x = {1, 2, 3};
Tuples[x, 2]

Obviously I get:

How can I delete all self-loops from this list, i.e., delete {1, 1}, {2, 2}, {3, 3}? Is there a built-in function?

Answer 1

I think you want Permutations:

Permutations[{1, 2, 3}, {2}]

{{1, 2}, {1, 3}, {2, 1}, {2, 3}, {3, 1}, {3, 2}}