how to create while statement

I'd create while statement that should works like:

A is an column vector

while [every A element is not equals to 1]
   do-something
end

the while statement have to be execute until when A vector is composed of all element 1 like A=[1 1 1 1 1]. I tried with all function but it didn't worked.any idea?

Answer 1

[Matt Fig]

while ~all(A==1)
    % code here that changes A 
end