How can I get elegantly an upper triangle random matrix (0 elsewhere)?

I have seen the triu and tril functions, but I can't use them to set to 0:

A = rand(4);
tril(A)=0; % won't work

any idea, other than using 2 for loops?

Answer 1

[Andrei Bobrov]

triu(A,1)

[cyril]

A = triu(rand(4), 1), yes I'm stupid