MATLAB: I need a program to check prime numbers

homeworkprime numbers matlab

%that is my programa and it doesn't work
clc
clear all
n=input('number')                 % Natural number that you want to know if it a prime number
i=2;
while i<=sqrt(n)
      if n==0 | n==1
          disp('not prime number');
      elseif rem(n,i)==0
          disp(n)
          disp('is prime number');
          break
      end
      i=i+1;
  end

Best Answer

out = n((n(:) == 2 | rem(n(:),2)) ...
                          & any(rem(n(:)./([2,3:2:sqrt(max(n))]),1) ~= 0,2));
use
>> n = [2    78    53    18    97     6];
>> out = n((n(:) == 2 | rem(n(:),2)) ...
                            & any(rem(n(:)./([2,3:2:sqrt(max(n))]),1) ~= 0,2))
out =
     2    53    97
>>
Related Question