Shifting the first element of an array to the end

Hi all, I.m trying to transform vector A into B as below,

A B

[ 1 2 3 4 ] [ 4 1 2 3 ]

Here is what I have got so far, but it didnt work out, please point out where I got it wrong

A = [1 2 3 4];

B = [A(1)];

for i = [2:length(A)]

B = [A(i) B]

end

disp(B);

Answer 1

[Matt J]

A=[ 1 2 3 4 ];

B=[A(end),A(1:end-1)]

B = 1×4

4 1 2 3

[Dillon La]

thanks a bunch!!!

[Dillon La]

but how would you do it if the loop starts from the second element?

Answer 2

[Ive J]

a = 1:4;
circshift(a, 1)

ans = 1×4

4 1 2 3

[Dillon La]

thank you, but do you have a simpler version of it?

I'm trying to figure out what I got wrong rather than using a new operator