How can I get all arranged different numbers from the given numbers?

Hello every one!

Can anyone can show me how can I get all arranged different numbers from the given numbers?

If that number is: 12 that equal 21 so we delete 21. Then we have matrix.

Like: if I was given 1 2 3 4 then i will arrange like this

Case 1:1 digit

we get: Maxtrix (1)= [1; 2;3;4] ;

Case 2:2 digit

we get: Maxtrix (2)= [1 2 ; 1 3; 1 4; 2 3; 2 4; 3 4];

Case 3:3 digit

we get: Maxtrix (3)= [1 2 3; 1 2 4; 1 3 4; 2 3 4];

Case 4:4 digit

we get: Maxtrix (4)= [1 2 3 4];

Answer 1

[Walter Roberson]

https://www.mathworks.com/help/matlab/ref/nchoosek.html

[Le Xuan Thang]

Walter Roberson. Many thank!