how to repeat an input question

Hi, I am trying to create a loop where someone is asked to input a sentence. I need them to keep typing sentences until they eventually type a word that will terminate the loop (such as 'END') How can I do this? Here is what I have so far.

I am an absolute beginner to Matlab and am having a lot of trouble comprehending the language of coding.

N=input('what is N?: ') %establishes N
A=input('give me a sentence!: ','s'); %asks user for sentence input

Answer 1

[KSSV]

A = 'start' ;
while ~strcmpi(A,'end')
    N=input('what is N?: ') %establishes N
    A=input('give me a sentence!: ','s'); %asks user for sentence input
end

Answer 2

[Walter Roberson]

all_A = {};
while true
  A = input('give me a sentence!: ','s'); %asks user for sentence input
  if strcmpi(strtrim(A), 'end'); break; end
  all_A{end+1} = A;
end