MATLAB: Following True or False

MATLABwhile loop

Consider the following example. a and b are two random variables. The loop will exit if and only if a+b=1. Is it true or false?

      a=rand;
      b=rand;
      while(a+b == 1)
          a=rand;
          b=rand;
      end

While executes as long as the given condition is true, so the loop would only execute as long as the sum was 1.

if a + b == 1 && 0 <= a && b <= 1
  %loop goes here
else
  pause(inf);  %"wait until those conditions are true"
end

It's matrix multiplication you can just transpose the matrix to match the rule of matrix multiplication:

a=rand(400,1); %example
b=rand(7,1);
ab=a*b.';      % -> b transposed here, now the size of b is 1 by 7
size(ab)     % which will be 400 by 7