How do I insert a column with zeros in the second column of a mxn matrix?

Hello, I would like to insert a column with zeros in the second column of a (mxn) matrix, after which the matrix would be a mx(n+1) matrix. It would be really grateful, if someone could help me on this. Thank you.

Answer 1

[Mischa Kim]

Brute force:

 A = [1 2 3; 4 5 6; 7 8 9]
 A = [zeros(size(A,1),1) A];
 A(:,[1 2]) = A(:,[2 1])

[SAI KRISHNA CHADA]

Thanks a lot for your promt solution. It works! :)